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Wisconsin Water Law
Why this matters: In Wisconsin you buy land, and water privileges come along with the land. You generally cannot buy a severable, tradeable water right the way you can in Colorado or Arizona. What you get instead is a bundle of use privileges that is real, valuable, and permanently subordinate to the public.
Facts current as of July 2026. Not legal advice. Every item here is something to verify with a licensed Wisconsin real estate attorney, the county zoning office, and a hydrogeologisthydrogeologistA geologist who specializes in groundwater. Worth hiring for acreage, tricky geology, or any large planned withdrawal. before closing.
1. The framing correction, stated plainly
Wisconsin is a riparianriparianThe eastern US rule, and Wisconsin's rule. If your land touches a lake or stream, you get reasonable use of that water, shared with everyone else whose land touches it. The rights come with the land and generally cannot be sold separately from it. state. RiparianriparianThe eastern US rule, and Wisconsin's rule. If your land touches a lake or stream, you get reasonable use of that water, shared with everyone else whose land touches it. The rights come with the land and generally cannot be sold separately from it. means your land touches a body of water, and the privileges that come with that contact are appurtenantappurtenantLegally attached to the land. An appurtenant right travels with the property when it sells, and you cannot peel it off and sell it on its own. to the land: they travel with the deed and they cannot be carved off and sold separately.
Wis. Stat. 30.133(1) makes this explicit. Since April 9, 1994, no owner of riparian land abutting navigablenavigable in factWisconsin's test for whether a waterway is public. Roughly: can a small recreational boat float on it on a regularly recurring basis. A lot of modest creeks qualify. water may grant any riparian right by easementeasementA recorded legal right for someone else to use part of your land, such as a driveway crossing or utility access. It survives the sale and binds you. or similar conveyance, except the bare right to cross the land to reach the water. That crossing right specifically excludes the right to place a pier or any structure in the water. (Wis. Stat. 30.133)
The Wisconsin Court of Appeals read that statute to bar severing riparian rights from riparian land in either direction: you cannot grant them to a non-riparian, and you cannot reserve them for yourself when you sell the land. Berkos v. Shipwreck Bay Condominium Ass’n, 2008 WI App 122, 313 Wis. 2d 609.
So there is no Wisconsin market in “acre-feetacre-footEnough water to cover 1 acre a foot deep: 325,851 gallons. Roughly what 2 or 3 suburban households use in a year.” or “shares” the way there is west of the 100th meridian. There is a market in shoreline frontage, wells, and permits.
What you actually acquire
| You acquire | You do not acquire |
|---|---|
| Land with frontage on a navigable water, or a well, or both | A quantified, severable, tradeable entitlement to water |
| A correlative privilege to make reasonable use of the water | Priority over neighbors based on when you started using it |
| Access to the water and the right to a pier in aid of navigation | Ownership of the lakebed, on natural lakes |
| A groundwater use privilege limited by the reasonable use rule | Immunity from a neighbor’s high capacity well |
| Whatever DNR permits and approvals attach to the property | A guarantee those permits survive a change in the rules |
2. The public trust doctrine
Text and lineage
Wis. Const. art. IX, sec. 1 says the Mississippi and “the navigablenavigable in factWisconsin's test for whether a waterway is public. Roughly: can a small recreational boat float on it on a regularly recurring basis. A lot of modest creeks qualify. waters leading into the Mississippi and St. Lawrence, and the carrying places between the same, shall be common highways and forever free.”
That language is lifted almost verbatim from Article IV of the Northwest Ordinance of 1787, which governed the territory that became Ohio, Indiana, Illinois, Michigan, Wisconsin, and Minnesota. The concern in 1787 was that new states would toll the rivers that connected the Great Lakes to the Mississippi. Functionally similar language appeared in the Wisconsin Enabling Act of 1846, then in the 1848 constitution. (Wisconsin LRB, “The Public Trust Doctrine,” Aug. 2020)
Under the equal footing doctrineequal footing doctrineNew states join the Union with the same rights the original 13 had, including ownership of the land under their navigable waters., a new state enters the Union with the same sovereign title to the beds of navigable waters that the original 13 states held. Wisconsin’s constitutional language sits on top of that federal baseline and courts have read it broadly for more than 150 years.
Why Wisconsin’s version is unusually strong
Most states apply the public trustpublic trust doctrineThe state holds navigable waters and the land beneath them for everyone, and cannot sign that away. Wisconsin's version is written into the state constitution and is among the strongest in the country. only to waters that are or were commercially navigable. Wisconsin applies it to any water that is navigable in fact for any purpose whatsoever, including pure recreation.
Diana Shooting Club v. Husting, 156 Wis. 261, 145 N.W. 816 (1914) is the hinge. The court held that navigable waters “should be free to all for commerce, for travel, for recreation, and also for hunting and fishing,” and that the doctrine “should not be limited or curtailed by narrow constructions.” The same opinion, at page 272, gave Wisconsin its working definition of the ordinary high water markordinary high water markThe physical line on a shoreline showing where water regularly reaches. On a Wisconsin lake your private property stops there and the state owns the bed below it. The DNR decides where the line is, not your deed..
Muench v. Public Service Commission, 261 Wis. 492, 53 N.W.2d 514 (1952) supplied the operative test and the standing rule. A stream is navigable in fact if it is “capable of floating any boat, skiff, or canoe, of the shallowest draft used for recreational purposes” (at 506). The court also held that a private citizen with no financial stake has standing to challenge an agency decision affecting public rights, and that the state has an affirmative duty to appear on behalf of the public.
Just v. Marinette County, 56 Wis. 2d 7, 201 N.W.2d 761 (1972) extended the logic onto dry land. The Justs filled wetlands in a conservancy district without a permit and argued the shoreland ordinance was a taking. The court disagreed, drawing a line between regulations that preserve rights the public already enjoys (police powerpolice powerA government's basic authority to regulate for public health and safety without having to pay you for the restriction., no compensation) and regulations that secure new public benefits (eminent domain, compensation required). Changing wetlands to something else was the harm the ordinance existed to prevent. (Justia)
The limits
Rock-Koshkonong Lake District v. DNR, 2013 WI 74, 350 Wis. 2d 45 held that the public trust doctrinepublic trust doctrineThe state holds navigable waters and the land beneath them for everyone, and cannot sign that away. Wisconsin's version is written into the state constitution and is among the strongest in the country. itself does not reach wetlands sitting above the ordinary high water markordinary high water markThe physical line on a shoreline showing where water regularly reaches. On a Wisconsin lake your private property stops there and the state owns the bed below it. The DNR decides where the line is, not your deed., because those are not navigable. DNR retained authority over them under its police powerspolice powerA government's basic authority to regulate for public health and safety without having to pay you for the restriction., on a different legal footing.
Movrich v. Lobermeier, 2018 WI 9, 379 Wis. 2d 269 held that where a private party owns the bed of an artificial flowage, the state cannot compel that owner to accept a neighbor’s pier. “The presence of navigable water does not cancel private property rights.”
3. Who owns the bed. Get this right, it is commonly misstated
The rule splits by water body type. It is not one rule.
| Water body | Who holds title to the bed | What the abutting owner holds |
|---|---|---|
| Natural lake or pond | The state, up to the ordinary high water mark | Title to the OHWM only, plus a qualified right in the exposed strip between the OHWM and the water’s edge |
| Stream or river | The riparian owner, out to the thread (geographic center) | Title to the thread, qualified by the public’s navigation and recreation rights if the stream is navigable |
| Artificial water body wholly on private land | The landowner | Full incidents of ownership, unless the water is directly and inseparably connected to a natural navigable water |
Sources: Mayer v. Grueber, 29 Wis. 2d 168, 173 (1965) (“the owner of property on a stream presumptively holds title to the middle of the watercourse… In the case of natural lakes and bodies of water, the adjacent landowner owns only to the shoreline”); Jones v. Pettibone, 2 Wis. 308 (1853); Diedrich v. Northwestern Union Ry., 42 Wis. 248 (1877); Klingeisen v. DNR, 163 Wis. 2d 921 (Ct. App. 1991) on the artificial water exception.
On the strip between the OHWM and the water on a natural lake, State v. McFarren, 62 Wis. 2d 492, 498 to 499 (1974) held the riparian owner may exclude the public from that area for every purpose except navigation. The public can wade and paddle through. They cannot picnic there.
Practical version: on a lake, the water and the bed are the state’s, and your deed stops at a line that moves. On a river, you own the mud out to the middle, and the public still gets to float over it.
4. Navigability, and why it decides everything else
Navigability is the switch. If a water on or touching the property is navigable, the public trust attaches, DNR jurisdiction attaches, chapter 30Chapter 30 permitWisconsin DNR permission to build or change anything on navigable water: piers, dredging, rock riprap, or grading near the shoreline. permitting attaches, and county shoreland zoningshoreland zoningCounty rules controlling what you can build within 1,000 feet of a lake or 300 feet of a river. They set your setbacks, your buffer, and how much of the lot you can pave. attaches. If it is not navigable, most of that falls away.
Wis. Stat. 30.10 declares all lakes navigable in fact to be navigable and public, and declares all streams, sloughs, bayous, and marsh outlets navigable in fact “for any purpose whatsoever” to be navigable.
The test evolved from timber to recreation:
| Era | Test | Case |
|---|---|---|
| 1868 to 1898 | Capable of floating saw logs or rafts of lumber (the “saw log” test) | Whisler v. Wilkinson, 22 Wis. 572 (1868); Sellers v. Union Lumbering Co., 39 Wis. 525 (1876) |
| 1877 | Navigable at regularly recurring water levels, not year-round | Olson v. Merrill, 42 Wis. 203 (1877) |
| 1914 | Recreation, hunting, and fishing count as public uses | Diana Shooting Club, 156 Wis. 261 |
| 1952 to today | Capable of floating any boat, skiff, or canoe of the shallowest draft used for recreation | Muench, 261 Wis. 492 at 506 |
Two refinements matter for a buyer:
Capacity governs, not actual use. Nobody has to have canoed it. DeGayner v. DNR, 70 Wis. 2d 936, 946 (1975); Village of Menomonee Falls v. DNR, 140 Wis. 2d 579, 592 to 593 (1987).
It does not have to be navigable all year. Navigable on a regularly recurring basis, such as spring thaw, for long enough to make recreational use possible, is enough. DeGayner, 70 Wis. 2d at 946 to 947.
That ditch across the back 40 may be a navigable water of the state. DNR’s Waterways Protection Program makes navigability determinations. Ask before you plan anything near it.
5. The Ordinary High Water Mark
The OHWM is the single most consequential line on a waterfront parcel, and it is not the line in your deed.
Definition: the point on the bank or shore up to which the presence and action of the water is so continuous as to leave a distinct mark, either by erosion, destruction of terrestrial vegetation, or other easily recognized characteristic. Diana Shooting Club, 156 Wis. 261, 272.
What the OHWM controls:
| Function | Effect |
|---|---|
| Boundary of the public trust | Below it on a lake, the state holds the bed in trust |
| Boundary of your title on a natural lake | Your fee ends there |
| Datum for the 75 foot shoreland setback | Measured from the OHWM, not from the waterline or the deed line |
| Datum for the 35 foot vegetative buffer | Measured from the OHWM inland |
| Trigger for chapter 30 permits | Structures and fill below it need DNR authorization |
Who determines it: the Wisconsin DNR, through field indicators. It is not fixed by survey and it can differ from both the platted meander line and the current water’s edge, sometimes by a lot. Higher ground can sit below the OHWM. State v. Trudeau, 139 Wis. 2d 91 (1987).
Before you buy waterfront, get a written OHWM determination or at minimum an OHWM staking from DNR. A parcel that looks like it has room for a house can turn out to have almost no buildable envelope once the 75 foot setback is measured from the real line. Start at DNR Waterway and Wetland Permits.
6. The riparian rights bundle
A riparian owner is one whose land abuts a waterway. Wisconsin courts use “riparian” for both rivers and lakes, though “littorallittoralThe same idea as riparian, but for land touching a lake or the sea instead of a flowing stream. Most people use the 2 words interchangeably.” is the technically correct term for lakes. Stoesser v. Shore Drive P’ship, 172 Wis. 2d 660, 665 n.1 (1993).
| Right | What it means | Who limits it |
|---|---|---|
| Reasonable use | Use the water for domestic, agricultural, industrial, and recreational purposes, with equal right against every other riparian | Every other riparian owner; DNR |
| Access | Get to the navigable water from your shoreline | Public trust; prior conveyances |
| Pier or wharf | Place a structure in aid of navigation | Wis. Stat. 30.12 and 30.13; DNR; local ordinance for non-exempt piers |
| Accretion and reliction | Keep land added by gradual deposit, or exposed by permanent recession | Nature |
| Use of the entire lake surface | Boat and fish across the whole navigable surface, not only in front of your lot | Public and other riparians equally |
| View and scenic enjoyment | Recognized as a public right in Muench, and protected through the doctrine | Neighbors’ equal rights; zoning |
All of it is subordinate. State v. Bleck, 114 Wis. 2d 454, 469 (1983): when riparian rights conflict with public rights, riparian rights lose. R.W. Docks & Slips v. State, 2001 WI 73 upheld a DNR dredging denial against a takings claim because the owner retained economically beneficial usebeneficial useActually using water for something productive: farming, drinking, industry, and in most western states now, keeping fish alive. In the West it is what earns you a water right and what caps how much you get. and because riparian rights on a state-owned bed are “qualified and subservient.”
The pier exemption, Wis. Stat. 30.12(1g)(f)
A riparian owner may place a pier with no DNR permit if it is outside an area of special natural resource interest, does not interfere with other riparians’ rights, and meets all of:
- No more than 6 feet wide.
- Extends no farther than the point where the water is 3 feet deep at summer low, or the point with adequate depth for mooring a boat or using a boat hoist, whichever is farther out.
- No more than 2 boat slips for the first 50 feet of your shoreline footage, plus 1 more slip per additional 50 feet.
- A loading platform may exceed 6 feet wide if its surface area is 200 square feet or less.
A pier that qualifies under 30.12(1g)(f) is also beyond the reach of municipal pier ordinances adopted under Wis. Stat. 30.13(2). Oneida County v. Sunflower Prop II, LLC, 2020 WI App 22, 392 Wis. 2d 293. Blow past 6 feet wide and you lose both the state exemption and the shield against the county ordinance.
Piers in place before April 17, 2012 have a separate grandfather path under 30.12(1k).
Keyhole and funneling
A “keyholekeyholeLocal rules that stop a developer from running many back-lot households through 1 narrow strip of lake frontage.” or “funnel” development is a subdivision where many back lots share one narrow strip of lake frontage, concentrating boats and traffic on a lot’s worth of shoreline.
Two layers restrict it. Wis. Stat. 30.133 blocks conveying riparian rights by easementeasementA recorded legal right for someone else to use part of your land, such as a driveway crossing or utility access. It survives the sale and binds you. to non-riparian back-lot owners, other than the bare crossing right. And many counties and towns have keyholekeyholeLocal rules that stop a developer from running many back-lot households through 1 narrow strip of lake frontage. or funneling ordinances that cap the number of dwelling units, boats, or slips permitted per foot of frontage.
ABKA Ltd. Partnership v. DNR, 2002 WI 106, 255 Wis. 2d 486 invalidated a Geneva Lake “dockominium” conversion on exactly this ground: the boat slips were not valid condominium units, so the arrangement was an unlawful transfer of riparian rights under 30.133 and a public trust violation.
If a listing promises “deeded lake access” for a lot that does not touch the water, treat that as a question for a real estate attorney, not a feature. Ask what instrument creates the access, when it was recorded relative to April 9, 1994, and whether the county has a keyhole ordinance.
7. Groundwater
Roughly two thirds of Wisconsinites get drinking water from groundwater, and about a third are on private wells. Groundwater is where the legal protection is thinnest.
The common law rule
State v. Michels Pipeline Construction, Inc., 63 Wis. 2d 278, 217 N.W.2d 339 (1974) overruled Huber v. Merkel, 117 Wis. 355 (1903) and threw out the English absolute dominionabsolute dominionPump as much as you want from under your own land, even if it drains your neighbor's well, with no liability. Nearly every state abandoned this. Texas largely kept it. rule, under which a landowner could pump without limit and without liability.
The court adopted section 858A of the Restatement (Second) of Torts, Tentative Draft No. 17. A landowner withdrawing groundwater is not liable for interference with a neighbor’s use unless one of these applies:
- The withdrawal unreasonably causes harm by lowering the water table or reducing artesian pressure.
- It exceeds the owner’s reasonable share of the annual supply or total store.
- It has a direct and substantial effect on a watercourse or lake and unreasonably causes harm.
That is a tort remedy after the fact, requiring proof of unreasonableness. It is not a permit system and it is not a queue.
The statutory layer
| Threshold | Requirement | Cite |
|---|---|---|
| Any well deeper than 10 feet | Notify DNR before construction, $50 fee | Wis. Stat. 281.34(3) |
| More than 100,000 gallons per day, combining all wells on one property | DNR high capacity well approval required before construction, $500 fee | Wis. Stat. 281.34(1)(b) and (2) |
| Capacity of 100,000 gpd (about 70 gpm) from any source | Register the withdrawal with DNR, statewide | DNR Water Use Registration |
Residential wells (100,000 gpd or less, serving a single-family or multifamily residence) and fire protection wells are excluded from the high capacity definition, and their capacity does not count toward the property total. That exclusion came from 2015 Wis. Act 177. A normal house well is nowhere near the threshold.
“One property” means all contiguous land controlled by one owner or lessee. Buying two adjacent parcels can combine their well capacities.
Special review triggers
Wis. Stat. 281.34(4) requires DNR to run an environmental review for 3 categories of proposed high capacity wellhigh capacity wellIn Wisconsin, a well (or all wells on 1 property combined) capable of pumping 100,000 gallons a day or more. These need DNR approval. An ordinary house well does not.:
- Located in a groundwater protection area, defined at 281.34(1)(am) as within 1,200 feet of a class I, II, or III trout stream, or of an outstanding or exceptional resource water that is not a trout stream.
- Water loss exceeding 95 percent of the amount withdrawn.
- Potential significant environmental impact on a spring, defined at 281.34(1)(f) as a concentrated groundwater discharge flowing at least 1 cubic foot per second at least 80 percent of the time.
If review shows a problem, 281.34(5)(b), (c), and (d) bar approval unless DNR can write conditions (location, depth, pumping capacity, rate of flow, ultimate use) that prevent significant environmental impact. There is a carve-out where the well is a public utility supply, no reasonable alternative location exists, and the impact is balanced by public health benefit.
DNR administers regional groundwater management under ch. NR 820, including groundwater management area designations (defined as a potentiometric surface drawn down 150 feet or more below its no-pumping level).
8. The high capacity well fight, as a timeline
This is the most contested question in Wisconsin water law, and the reason a buyer near a farming region should read the well records before signing.
| Date | Event |
|---|---|
| July 6, 2011 | Lake Beulah Management District v. DNR, 2011 WI 54, 335 Wis. 2d 47. Unanimous. DNR has both the statutory authority and a constitutional public trust duty to consider a proposed high capacity well’s environmental effects, whenever presented with “sufficient concrete, scientific evidence of potential harm.” That duty flows from the legislature’s delegation of public trust duties in Wis. Stat. 281.11 and 281.12. |
| May 23 to June 8, 2011 | 2011 Wis. Act 21 passed and took effect, roughly 1 month before Lake Beulah issued. It created Wis. Stat. 227.10(2m): no agency may enforce “any standard, requirement, or threshold, including as a term or condition of any license,” unless “explicitly required or explicitly permitted by statute or by a rule.” The Lake Beulah court never applied it. |
| July 1, 2014 | Wis. Stat. 281.34(5m), created by 2013 Wis. Act 20 (the biennial budget), takes effect: “No person may challenge an approval, or an application for approval, of a high capacity well based on the lack of consideration of the cumulative environmental impacts of that high capacity well together with existing wells.” |
| May 10, 2016 | AG Brad Schimel issues OAG-01-16, concluding that Act 21 stripped DNR of the implied public trust authority Lake Beulah recognized, and that DNR could not impose monitoring or cumulative impact conditions. DNR follows it and approves wells without environmental review. |
| 2017 | A Dane County circuit court sides with Clean Wisconsin and orders DNR to invalidate 7 central Wisconsin high capacity well permits for failure to consider impacts. |
| 2017 | 2017 Wis. Act 10 creates Wis. Stat. 281.34(2g). Owners of already approved high capacity wells may repair, reconstruct, replace (within a 75 foot radius or farther from a groundwater protection area), and transfer the approval with the land, all without new DNR approval, with 90 day notice. |
| May 1, 2020 | AG Josh Kaul withdraws OAG-01-16 in its entirety, citing the circuit court order. DNR resumes considering environmental impacts. |
| July 8, 2021 | Clean Wisconsin, Inc. v. DNR, 2021 WI 72, 398 Wis. 2d 433, 961 N.W.2d 611. 4 to 2. Dallet, J. wrote the majority, joined by Ziegler, C.J., Ann Walsh Bradley, J., and Karofsky, J. Rebecca Grassl Bradley, J. dissented, joined by Roggensack, J. Hagedorn, J. did not participate. Holding: 227.10(2m) does not command a different result than Lake Beulah. Wis. Stat. 281.11 and 281.12 supply the explicit authority. DNR erred in concluding it had none, and 8 well approvals were vacated and remanded. |
| July 8, 2021 | Clean Wisconsin, Inc. v. DNR, 2021 WI 71, 398 Wis. 2d 386, 961 N.W.2d 346, the companion case. 4 to 2. Karofsky, J. wrote the majority, joined by Ziegler, C.J., Ann Walsh Bradley, J., and Dallet, J. Roggensack, J. and Rebecca Grassl Bradley, J. each dissented. Hagedorn, J. did not participate. Holding: DNR had explicit authority under Wis. Stat. 283.31(3) to (5) to impose an animal unit maximum and off-site groundwater monitoring on Kinnard Farms’ CAFO discharge permit. |
Where it stands, July 2026
Lake Beulah is good law. DNR has authority and a duty to consider the environmental effects of a proposed high capacity wellhigh capacity wellIn Wisconsin, a well (or all wells on 1 property combined) capable of pumping 100,000 gallons a day or more. These need DNR approval. An ordinary house well does not. when it has concrete scientific evidence of potential harm to waters of the state. 227.10(2m) does not block that.
Wis. Stat. 281.34(5m) is still on the books and has not been repealed. So DNR may consider cumulative impacts, and a challenger may not attack an approval on the ground that DNR failed to. Those are different questions, and the 2021 decisions did not resolve the second one. The Wisconsin Legislative Council flagged this gap and it remains open. [UNVERIFIED] whether any post-2021 Wisconsin appellate decision has construed 281.34(5m) directly.
No 2025-2026 session legislation restoring an affirmative cumulative impact review mandate has been enacted as of July 2026.
Central Sands, the place where this is not abstract
The Central SandsCentral SandsA sandy farming region in central Wisconsin with heavy irrigation. It is the epicenter of the state's groundwater drawdown fights. is a sandy, fast-recharging, shallow aquiferaquiferUnderground rock or sand with water in the spaces between the grains. It is not an underground lake. Water seeps through it slowly, often only feet per year. across Portage, Waushara, Adams, and Marquette counties, tightly connected to surface water and heavily irrigated for potatoes and vegetables.
The DNR’s Central Sands Lakes Study, completed in 2021 with WGNHS, USGS, and the UW System, found:
- Groundwater withdrawals significantly reduce water levels in Long Lake and Plainfield Lake, with ecosystem and human-use impacts.
- Pleasant Lake reductions are not significant but sit near the significance threshold.
- No single well causes it. The Long Lake impact comes from the collective drawdowndrawdownHow far the water level drops while a pump is running. of roughly 200 irrigation wells within about 5 miles. Roughly 140 wells within 4 miles drive the Plainfield Lake impact.
- DNR recommended creating a regional water use district. The legislature has not created one.
The Little Plover River near Stevens Point is the emblem: a class I trout stream that has gone dry in stretches, with low flows tied to nearby pumping.
Buyer takeaway: in the Central SandsCentral SandsA sandy farming region in central Wisconsin with heavy irrigation. It is the epicenter of the state's groundwater drawdown fights., the relevant question is not whether your well is legal. It is how many high capacity wells sit within 5 miles of the parcel, and whether the water table has been trending down. Pull that from the DNR Water Quantity Data Viewer.
9. Wetlands and shoreland zoning
The county mandate
Wis. Stat. 59.692 requires every county to zone all shorelands in unincorporated areas. Shoreland is defined as land within 1,000 feet of the OHWM of a navigable lake, pond, or flowage, or within 300 feet of a navigable river or stream, or to the landward edge of the floodplain, whichever is greater.
Cities and villages exercise the same authority inside municipal limits under Wis. Stat. 62.231 and 61.353. Standards live in Wis. Admin. Code ch. NR 115. Counties administer it, not DNR. The county zoning office is who you call.
The core numbers, NR 115.05
| Standard | Value |
|---|---|
| Building setback from OHWM | 75 feet |
| Reduced setback where an existing development pattern exists (setback averaging) | Average of the principal structure on each adjacent lot, never below 35 feet |
| Vegetative buffer zone | 35 feet inland from the OHWM, vegetation removal restricted |
| Impervious surface | 15 percent of the lot, up to 30 percent with shoreland mitigation |
| Height limit within 75 feet of the OHWM | 35 feet |
| Minimum lot, sewered | 65 foot average width, 10,000 square feet |
| Minimum lot, unsewered | 100 foot average width, 20,000 square feet |
Exceptions to the 75 foot setback include piers, boat hoists, fishing rafts, utilities, walkways and stairways to the shore, decks or gazebos complying with 59.692(1v), and boathouses. (DNR Shoreland Management Program)
Nonconforming structures: you may maintain and repair them. You may expand vertically, or relocate or reconstruct, if the structure is at least 35 feet from the OHWM and you provide shoreland mitigation. Lateral or vertical expansion is unrestricted if the expanded portion sits beyond the 75 foot setback.
The ceiling flip, 2015
From 1966 until 2015, NR 115 was a floor. Every county except Milwaukee had to meet or exceed it, and most counties adopted stricter rules.
2015 Wis. Act 55, the 2015-17 biennial budget, inverted that effective July 14, 2015. Counties may no longer regulate a shoreland matter more restrictively than NR 115. Where NR 115 regulates something (setback from OHWM, lot size, impervious surface, vegetative buffer, height), the state number controls and the county must follow it. (Wisconsin REALTORS Association, Oct. 2015)
Counties retain authority over matters NR 115 does not regulate, such as side yard setbacks and road setbacks.
What this means for a buyer: an older county ordinance with a 100 foot setback may be unenforceable to the extent it exceeds NR 115. Do not assume either way. Ask the county zoning administrator for the current adopted ordinance and the date it was last updated for Act 55.
Wetlands
Just v. Marinette County is why wetland restrictions on shoreland survive takings challenges in Wisconsin. Wetlands are separately regulated under Wis. Stat. ch. 281 subch. II and NR 103, and federal jurisdiction under the Clean Water Act has narrowed since Sackett v. EPA, 598 U.S. 651 (2023). Wisconsin’s state wetland program still applies to many wetlands that dropped out of federal jurisdiction. Check the DNR Surface Water Data Viewer wetland layer, then get a delineation before you plan a driveway or a septic field.
10. Water use registration and reporting
Two regimes stack. The statewide one applies everywhere. The Great Lakes basin one applies on top if the withdrawal sits in the Lake Michigan or Lake Superior basin.
| Regime | Trigger | Obligation |
|---|---|---|
| Statewide registration | Water supply system with capacity to withdraw 100,000 gpd (about 70 gpm), from any source | Register with DNR before withdrawing; report annually. Only 2 exemptions: supplying vehicles, and temporary firefighting or emergency withdrawals |
| Great Lakes basin, general permit | Withdrawal averaging 100,000 gpd or more in any 30-day period, below 1,000,000 gpd for 30 consecutive days | Coverage under a DNR general water use permit before withdrawing. Wis. Stat. 281.346(4s) |
| Great Lakes basin, individual permit | At least 1,000,000 gpd for 30 consecutive days | Individual water use permit. Wis. Stat. 281.346(5) |
| Great Lakes basin, discretionary escalation | 100,000 gpd class withdrawal located in a groundwater protection area or a designated groundwater management area | DNR may require an individual permit. Wis. Stat. 281.346(4s)(dm) |
There is no fee for a water use permit. There is a $500 fee for a high capacity well approval and a $50 fee for a non-high-capacity well notification. (DNR Water Use Permitting)
Watch the termination trap. If a registration is terminated (pump downsized, well sealed), the baseline, grandfathered status, high capacity approval, and chapter 30 permitChapter 30 permitWisconsin DNR permission to build or change anything on navigable water: piers, dredging, rock riprap, or grading near the shoreline. go with it. Restarting later makes you a new withdrawer under current rules. If you are buying land with an existing high capacity well and you value the approval, do not let it lapse between contract and closing.
Transfers: Wis. Stat. 281.34(2g)(a)4. lets a high capacity well approval transfer with the land. Use DNR Form 3300-266. A chapter 30.18 surface water withdrawal permit is different: if the new owner does not own the exact same riparian land as the original permit holder, the permit cannot be transferred and the buyer must apply fresh.
11. What you actually own
| Right | Do you have it | Who can take it away or limit it | How to verify before closing |
|---|---|---|---|
| Title to the lakebed in front of your lot | No, on a natural lake. Your fee stops at the OHWM | Fixed by the constitution and Mayer v. Grueber | Title commitment plus a DNR OHWM determination |
| Title to the streambed to the thread | Yes, on a river, unless the deed says otherwise | Public navigation and recreation easement; a prior deed reservation | Read the deed chain at the county Register of Deeds |
| Reasonable use of surface water | Yes, correlative with every other riparian | Other riparians; DNR under ch. 30 and ch. 281 | DNR Waterways staff for the water body |
| Access to the navigable water | Yes | Prior easements; keyhole ordinances; a bulkhead line | Title search plus county zoning |
| Exempt pier | Yes, if it meets all of Wis. Stat. 30.12(1g)(f) | DNR if it exceeds the exemption; the county if it does | Measure the existing pier. Confirm slip count against frontage |
| Right to build within 75 feet of the OHWM | Generally no | County shoreland ordinance under NR 115 | County zoning administrator, in writing |
| A private well | Yes, if it complies with NR 812 | DNR construction standards; contamination | Well Driller’s Report; water quality test before closing |
| A high capacity well | Only if approved. Approval transfers with the land under 281.34(2g)(a)4. | DNR may modify or rescind under 281.34(7); conditions survive transfer | DNR high capacity well search; read the approval and its conditions |
| Groundwater free of a neighbor’s drawdown | No guarantee. Only a Michels Pipeline reasonable use claim after harm | Neighboring high capacity wells; 281.34(5m) bars cumulative impact challenges | Count high capacity wells within 5 miles on the Water Quantity Data Viewer |
| Water quality | No property right at all | CAFOs, PFAS sources, septic density, karst | BRRTS; PFAS Data Viewer; independent well test |
| Freedom from lake level change | No | Nature, dams, DNR under ch. 31 | USACE water level records; bluff and shoreline history |
Related
Research demo, not legal advice. Facts current as of July 2026. Water law is state-specific and moves quickly, so confirm anything you plan to act on with a licensed attorney and the relevant state agency.