Nitrate In Drinking Water In Kansas
What residents of Kansas need to know about nitrate in drinking water — including how it enters water, which utilities have documented violations, and what steps to take.
Source: EPA SDWIS, Kansas Department of Health and Environment (KDHE), CDC · Last reviewed: 2025-01-01
Quick Answer
Is nitrate in drinking water a real concern in Kansas?
Yes — western Kansas draws from the High Plains (Ogallala) Aquifer, where nitrate from decades of irrigated agriculture and large cattle feedlot operations has elevated groundwater nitrate in some areas.
Is this mostly a public-water issue, a private-well issue, or both?
Primarily private well users in western Kansas agricultural counties and the High Plains Aquifer zone; some small public systems drawing from the Ogallala also monitor elevated nitrate.
What is the main reason residents should care?
Western Kansas's massive cattle feedlot operations and irrigated corn and wheat farming have contributed to documented nitrate elevation in the Ogallala Aquifer. The High Plains Aquifer is a finite, slowly recharging resource — nitrate that enters it can persist for decades.
Key Facts
| EPA Nitrate MCL | 10 mg/L as N |
| SW Kansas feedlot concentration | Major cattle feedlot operations in Finney, Seward, Grant Counties — animal waste is a nitrate source |
| Ogallala Aquifer | Slowly recharging — nitrate contamination persists; documented elevation in some western KS zones |
| Private well risk | Southwest and northwest Kansas agricultural counties — annual testing recommended |
| State oversight | Kansas Department of Health and Environment (KDHE) |
Why This Matters in Kansas
Kansas is one of the nation's leading beef producing states, with large cattle feedlots concentrated in southwest Kansas — particularly around Dodge City, Liberal, and Garden City. These operations generate enormous volumes of animal waste. Irrigated corn and wheat farming across the Kansas High Plains draws from the Ogallala Aquifer and applies heavy fertilizer loads. Nitrate from both feedlot waste and fertilizer has been documented in Ogallala Aquifer groundwater in parts of southwest and northwest Kansas. The Ogallala recharges very slowly, meaning contamination can persist for generations. KDHE monitors public water systems and provides private well testing guidance.
Critical — Infants Under 6 Months
Do not use tap water that exceeds 10 mg/L nitrate-nitrogen to prepare infant formula or feed infants under six months. Boiling will concentrate nitrate — do not boil. Use bottled water or a certified reverse osmosis system (NSF/ANSI 58) until the issue is resolved.
Kansas Utilities With Nitrate Violation Records
The utilities listed below have at least one nitrate violation on record in EPA's SDWIS database. Violations may be open or resolved — see individual utility pages for current status and risk level.
Water District 1 of Johnson Co
Kansas City · 490,000 served
City of Wichita
Wichita · 395,699 served
City of Topeka
Topeka · 125,963 served
City of Lawrence
Lawrence · 95,256 served
City of Salina
Kansas · 46,481 served
Leavenworth Water Department
Leavenworth · 38,757 served
Frusi Water Treatment Plant
Fort Riley · 35,784 served
City of Garden City
Garden City · 35,126 served
University of Kansas
Lawrence · 35,000 served
City of Dodge City
Kansas · 27,104 served
How Nitrate Gets Into Drinking Water
Agricultural fertilizer and manure runoff
Nitrogen-based fertilizers and animal waste applied to Kansas cropland can leach into groundwater or run off into surface water supplies. This is the dominant nitrate pathway in most agricultural regions.
Septic system effluent
Failing or poorly sited septic systems release nitrogen-rich wastewater near drinking water wells. Rural areas with high well density and aging septic infrastructure face elevated risk.
Concentrated animal feeding operations (CAFOs)
Large livestock facilities generate significant waste. Lagoon leaks and overapplication of manure to nearby fields can create localized nitrate hotspots in groundwater.
Natural geological deposits
In some regions, naturally occurring nitrogen compounds in soil and bedrock contribute background nitrate levels to groundwater independent of agricultural activity.
Who Should Pay Closest Attention
Private well users in southwest Kansas feedlot country (Finney, Seward, Grant, Haskell Counties) and northwest Kansas farming counties should test for nitrate annually. Households with infants using private well water in these counties should prioritize current testing before formula preparation.
Households with infants under six months
Pregnant residents
Private well owners in agricultural areas
Households near livestock operations or CAFOs
Rural residents on shallow groundwater wells
Households with older or failing septic systems nearby
How to Check Your Situation in Kansas
- 1
Identify your water utility. Use the ZIP lookup below or browse the Kansas utility directory on this site.
- 2
Read your utility's page on this site to see its current risk level and any open nitrate violations.
- 3
Review your utility's most recent Consumer Confidence Report (CCR) — mailed annually or available on the utility's website. It must disclose any MCL exceedances.
- 4
If you are on a private well, arrange testing at a Kansas Department of Health and Environment (KDHE)-certified lab. Your state health department maintains a list of certified labs. Annual testing is recommended in agricultural areas.
- 5
If you have an infant under six months, use bottled water or a certified RO system (NSF/ANSI 58) immediately as a precautionary measure — do not wait for test results if you are in a high-risk area.
- 6
If your utility issues a nitrate exceedance notice, follow their guidance and do not use tap water for infants until the issue is resolved.
Treatment Options
Carbon filters and boiling do not remove nitrate. Only the options below are effective.
NSF/ANSI Standard 58 — Reverse Osmosis
RO systems certified to NSF/ANSI 58 reduce nitrate by 85–95% at the point of use. Under-sink installation required. The most practical residential option for nitrate concerns.
Distillation
Distillation units effectively remove nitrate along with most other dissolved contaminants. Suitable for drinking and cooking water — not whole-house use.
Anion Exchange
Ion exchange systems designed for nitrate removal exchange nitrate ions for chloride on a resin bed. Effective as a point-of-entry system; requires periodic regeneration and monitoring.
Carbon filters do NOT remove nitrate
Standard pitcher filters, faucet filters, and under-sink carbon units — including those certified NSF/ANSI 42 or 53 — do not remove nitrate. Do not use these for nitrate reduction.
Frequently Asked Questions
Related Pages
Nitrate — National Overview
All U.S. utilities with nitrate records
Kansas State Overview
All utilities and water quality data
Lead in Drinking Water
A separate but common concern
Reverse Osmosis Guide
Removes 85–95% of nitrate
Well Water Guide
Private well testing and safety
All Contaminants
Complete reference library
Data Sources & Provenance
All data on this page is sourced from official U.S. government or public datasets.
Find Your Utility
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Kansas Department of Health and Environment (KDHE) ↗