Nitrate In Drinking Water In North Dakota
What residents of North Dakota 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, North Dakota Department of Environmental Quality (NDDEQ), CDC · Last reviewed: 2025-01-01
Quick Answer
Is nitrate in drinking water a real concern in North Dakota?
Yes — North Dakota is a major grain and sunflower producing state, and fertilizer application in its prairie pothole landscape can elevate nitrate in glacial aquifer groundwater used by private wells.
Is this mostly a public-water issue, a private-well issue, or both?
Primarily private well users in agricultural counties; North Dakota's glacial aquifer system supplies many rural private wells that may be affected by agricultural nitrate.
What is the main reason residents should care?
North Dakota's wheat, corn, soybeans, and sunflower production involves significant fertilizer use on landscapes with glacial till soils and shallow aquifers. Private wells drawing from glacial aquifers in agricultural areas can accumulate nitrate from surface farming activity over time.
Key Facts
| EPA Nitrate MCL | 10 mg/L as N |
| Agricultural sources | Wheat, sunflowers, soybeans, and corn production with significant fertilizer use |
| Glacial aquifers | Shallow glacial aquifer groundwater in agricultural areas can accumulate nitrate |
| Private well risk | Agricultural county well users should test annually |
| State oversight | North Dakota Department of Environmental Quality (NDDEQ) |
Why This Matters in North Dakota
North Dakota is one of the nation's major grain-producing states — a top producer of wheat, sunflowers, canola, and increasingly soybeans and corn. Agricultural fertilizer use across the state's prairie landscape contributes nitrogen loading. North Dakota's glacial till soils and shallow glacial aquifers in agricultural areas can be susceptible to nitrate accumulation. The Missouri River and its tributaries provide surface water for some communities, but many rural North Dakotans rely on groundwater wells. NDDEQ monitors public water systems for nitrate compliance and provides private well testing guidance through county health departments.
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.
Largest North Dakota Water Utilities
No nitrate violations on record in EPA SDWIS for North Dakota utilities in our database. Browse the largest utilities to review their full water quality record.
How Nitrate Gets Into Drinking Water
Agricultural fertilizer and manure runoff
Nitrogen-based fertilizers and animal waste applied to North Dakota 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 agricultural North Dakota counties should test for nitrate annually. Households with infants relying on private well water should test before formula preparation, particularly in areas with intensive row crop farming.
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 North Dakota
- 1
Identify your water utility. Use the ZIP lookup below or browse the North Dakota 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 North Dakota Department of Environmental Quality (NDDEQ)-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
North Dakota 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.