Well Water and High-Capacity Irrigation Wells in Waushara County, Wisconsin

What a "high-capacity well" is, and why the Central Sands has so many

Under Wisconsin law (Wis. Stat. § 281.34), a "high-capacity well" is one with the capacity to withdraw more than 100,000 gallons of groundwater per day -- a threshold most household or small-farm wells never approach, but one that ordinary center-pivot irrigation wells for row-crop agriculture routinely exceed. The Wisconsin DNR regulates high-capacity well construction and permitting statewide, but the practical stakes are highest in places like the Central Sands region, where sandy, highly permeable soil sits over a shallow aquifer that is closely connected to the region's lakes and streams -- meaning a well drawing heavily from the aquifer can measurably affect a nearby lake's water level, not just the groundwater itself.

That connection is why the Central Sands region -- roughly 1.75 million acres spanning Adams, Marathon, Marquette, Portage, Shawano, Waupaca, Waushara, and Wood Counties -- has seen its high-capacity well count grow to roughly 3,100 active wells, nearly 30 times the number in place six decades ago, with the average irrigation well now drawing around 1.4 million gallons of water per day. Waushara County sits squarely within this region, and its own lakes are directly implicated.

The 2017 law and the Central Sands Lakes Study: what it found in Waushara County specifically

In 2017, then-Governor Scott Walker signed a bill that specifically directed the DNR to study high-capacity-well impacts on three named lakes in Waushara County: Long Lake, Plainfield Lake, and Pleasant Lake. This wasn't a general regional study that happened to include these lakes -- the legislature named them directly, reflecting how visible the impact had already become locally. The resulting Central Sands Lakes Study concluded that groundwater withdrawals for irrigated agriculture were responsible for measurably lowering water levels on these lakes, with reported reductions of 2 to 3 feet on Long Lake -- enough to affect recreational use, fish and aquatic plant communities, and lake water chemistry, and to affect a federally endangered plant species found near Plainfield.

The scale of well density driving this is worth noting directly: more than 200 high-capacity wells sit within roughly a 5-square-mile radius around Long and Plainfield Lakes alone. The DNR's report to the state legislature recommended a regional management strategy -- specifically raising the idea of a water use district -- to coordinate future withdrawals and reduce further impact to the lakes. As of this research pass, this is best understood as an active regulatory conversation rather than a fully resolved one; a buyer evaluating land near any of these three lakes should ask the DNR and county directly about the current status of any water-use-district proposal or related permitting changes, rather than assuming the situation described in the study is either fixed or unchanged.

A related but distinct example: the Pine Breeze Dairy manure spills

Separate from the high-capacity-well/lake-level story, Waushara County has also seen a documented, multi-year manure-spill history at Pine Breeze Dairy, operated by Breeze Dairy Group (which operates five farms across Wisconsin). DNR records cited in news reporting describe nine manure spills at the Waushara County farm over roughly an 11-year span, totaling around 150,000 gallons, including releases into an adjacent wetland and a neighbor's pond between 2013 and 2017 attributed to equipment failures. This is a surface-water and wetland issue rather than a groundwater/high-capacity-well one, but it's a second, independently documented example of the kind of agricultural water-quality pressure present in the county -- worth knowing if you're evaluating land near a large-scale dairy operation specifically, separate from the irrigation-well story above.

What to actually do before buying near Long, Plainfield, or Pleasant Lake

1. Ask the Wisconsin DNR High Capacity Well program directly for the current status of any water-use-district proposal or permitting changes affecting Long, Plainfield, or Pleasant Lake, since the Central Sands Lakes Study's 2-to-3-foot water-level findings were a snapshot in time, not necessarily today's number.
2. If evaluating waterfront or near-waterfront property on one of these three lakes specifically, ask about the property's current water depth and shoreline conditions directly (in person or with a recent survey) rather than relying on older listing photos or descriptions, given the documented lake-level variability.
3. If considering an irrigation well of your own on Central Sands land in Waushara County, confirm with the DNR whether a proposed well would meet the 100,000-gallon/day high-capacity threshold, and what permitting review that would trigger given the documented cumulative impact in this specific area.
4. Separately, if evaluating land near an existing large-scale livestock operation, ask the Wisconsin DNR and Waushara County Land Conservation & Zoning Office about that operation's permit history and any documented manure-management violations.