Nebraska Private Well Water Quality 2026

Nitrate: Nebraska’s Defining Well Water Problem

Nebraska is the most irrigated state in the nation, and that has had a direct, documented impact on its groundwater. Decades of nitrogen fertiliser application and livestock manure runoff have elevated nitrate levels across Nebraska’s aquifers, including the vast Ogallala aquifer that underlies much of the state. According to the Flatwater Free Press — drawing on University of Nebraska Water Center data — Nebraska’s median groundwater nitrate level doubled between 1978 and 2019, and contaminated areas continue to expand, particularly in the eastern half of the state.

The scale of the problem for well owners is significant. Around 400,000 Nebraskans — approximately 20% of the state’s population — depend on private wells for their drinking water, according to the University of Nebraska–Lincoln’s Daugherty Water for Food Global Institute. Unlike public water systems, these wells face no mandatory testing requirements. The most comprehensive picture of private well nitrate contamination comes from two citizen science initiatives. The University of Nebraska–Lincoln “Well Water, Farm Families and Better Health” study — collecting 327 well water samples across 45 counties — found that 20.5% of sampled wells had nitrate at or above the EPA’s safe drinking water standard of 10 parts per million. Separately, UNL’s Water Quality + Citizen Science testing programme reports that around one in four of the hundreds of wells tested each month exceed the EPA limit.

In January 2020, the Lower Loup Natural Resources District enacted Phase III groundwater management for an area northeast of Columbus — designated as Water Quality SubArea 30 — after nitrate readings in local wells reached as high as 48 parts per million, nearly five times the EPA safe limit. The city of Plainview has had two of its four municipal wells shut down due to high nitrate. The city of Hastings spent $15 million building a treatment plant. These are public system responses — private well owners have no equivalent safety net.

Nitrate is colourless and tasteless. It cannot be detected without testing. High nitrate is particularly dangerous for infants under six months, in whom it can cause methemoglobinemia — “blue baby syndrome” — where oxygen levels in the blood drop to dangerous levels. There is also growing evidence linking long-term nitrate exposure to cancer: Nebraska holds the 7th-highest pediatric cancer rate in the nation according to CDC data, and is the highest of any state west of Pennsylvania. State medical researchers at the University of Nebraska Medical Center have identified nitrates in drinking water as one of the factors under active investigation in relation to this elevated rate.

Nebraska’s 23 Natural Resources Districts (NRDs) each manage groundwater quality in their area — setting up water quality management phases, restricting fertiliser applications, and requiring nitrate testing in high-risk zones. But these measures principally apply to public water systems and agricultural practices. Private domestic wells sit entirely outside this protection framework.

PFAS in Nebraska Well Water

Nebraska’s PFAS picture is less prominent than Michigan’s or North Carolina’s, but it is not absent. The Nebraska Department of Water, Energy, and Environment (DWEE, formerly NDEE) compiled a statewide PFAS inventory in 2017, identifying 990 facilities across the state that may have used or manufactured PFAS — including municipal airports, military installations, industrial sites, and fire training facilities.

Nebraska’s public water systems have been tested for 29 PFAS compounds under the federal UCMR 5 monitoring programme (2023–2025). As of December 2024, the results are split across two separate sampling efforts: of the 52 large community water systems tested under UCMR 5, three were found above one or more PFAS MCLs. Across the state’s much larger separate free-sampling programme for small community water systems (serving under 3,300 people), 34 PFAS detections above federal MCLs were recorded across 416 systems tested. These are all public water systems — private wells in proximity to the same industrial or military sources have not been systematically tested.

Offutt Air Force Base, south of Omaha, is identified as one of the most significant military PFAS sites in the Midwest, with historical AFFF firefighting foam use on the flight line and in fire training areas. Nebraska has no state-level PFAS MCLs for drinking water and relies entirely on the federal standards — with public water system compliance required by 2031. That federal deadline does not apply to private wells.

Pesticides and Agricultural Chemicals

Nebraska is one of the largest corn and soybean producing states in the US, and the herbicide atrazine is widely applied across its cropland. The Nebraska Department of Agriculture has classified both atrazine and acetochlor as “pesticides of concern” — chemicals identified at levels in the environment that may cause human health effects. Atrazine has been detected in Nebraska groundwater and is a potential endocrine disruptor linked to reproductive and developmental effects at low concentrations.

A USGS study of the Papio-Missouri River Natural Resources District in eastern Nebraska detected atrazine in 15 of 26 well samples — all below regulatory limits, but indicative of the extent of agricultural chemical migration into groundwater across the state. For private well owners in crop-growing areas, a pesticide panel is a worthwhile addition to standard testing.

Bacteria and Other Contaminants

Coliform bacteria contamination is a risk in any private well, particularly where wells are older, improperly sealed, or located near livestock operations and septic systems. In Nebraska’s rural agricultural landscape — with dense livestock operations and widespread septic use — the risk of bacterial contamination entering shallow wells is real. The DWEE recommends annual bacteria testing for all private well owners alongside nitrate testing.

Separately, the UNL Know Your Well programme — which has tested over 300 private wells in Nebraska — found that some wells also have concentrations of arsenic, manganese, and uranium exceeding maximum contaminant levels for safe drinking water. Nebraska’s geology does not carry the same widespread natural arsenic risk as states like Maine or New Hampshire, but these findings confirm that a one-time baseline test for arsenic, manganese, and uranium is worth including for any Nebraska well owner.

Regulatory Situation for Nebraska Well Owners

Private drinking water wells in Nebraska are not regulated under the federal Safe Drinking Water Act, and the Nebraska Department of Water, Energy, and Environment (DWEE) has no legal authority to monitor or mandate testing of private wells. DWEE recommends that private well owners test annually for bacteria and nitrate, and has in the past offered free testing kits and rebate programmes — but these are voluntary initiatives, not enforceable requirements.

A 2022 Nebraska Rural Poll found that fewer than one-third of well-owning respondents had ever tested their water for nitrate. Among those who had tested, higher-income households were twice as likely to have done so as lower-income households — a pattern that reflects both cost barriers and an awareness gap that disproportionately puts lower-income rural families at risk.

In 2024, DWEE published the Nitrate in Drinking Water Study — the largest private domestic well nitrate sampling effort in state history, with nearly 3,500 test kits returned for analysis. The study’s findings were presented to the Nebraska Legislature as the basis for state-level action on nitrate in both public and private water supplies. LB 1368, the Nitrogen Reduction Incentive Act, was passed in 2024, directing $1 million to incentivise nitrogen reduction by agricultural producers — though the study’s broader recommendations for private well protection remain under development.

Check our Nebraska municipal water quality page for city-by-city tap water data including Omaha and Lincoln, or use our live boil water notice tracker for active advisories across the state.

Known High-Risk Areas in Nebraska

If you live or work near any of the following areas, well water testing is urgent — not precautionary.

How to Test Your Nebraska Well Water — and What to Do Next

The DWEE recommends that all private well owners in Nebraska test annually for coliform bacteria and nitrate — and at least once for a broader range of contaminants including PFAS, arsenic, manganese, lead, and pesticides. Testing in spring is preferred, and wells should be sampled around the same time each year for consistency.

The DHHS Public Health Environmental Lab in Lincoln offers nitrate test kits for around $16 and bacteria kits for around $17, with results returned by mail. Kits and instructions are available via dhhs.ne.gov or by calling DWEE at 402-471-2186. For a broader contaminant panel covering PFAS, atrazine and metals, your local Natural Resources District can advise on certified private laboratories in your area — many NRDs cover the cost for registered domestic well owners.

If your nitrate result comes back above 10 ppm, do not use the water for drinking or infant formula preparation. Boiling does not reduce nitrate levels — it concentrates them. Reverse osmosis or ion exchange treatment is the recommended solution. Our well water filter guide covers point-of-use RO systems for nitrate and PFAS, UV disinfection for bacteria, and whole-house well systems for comprehensive treatment. You can also browse our full water filter solutions page or check your ZIP code for local water quality context.

For other Great Plains and Midwest well water risks, see our pages on Iowa wells, Wisconsin wells, and Michigan wells. Return to the private well water directory to find your state.