Nitrate In Drinking Water In Vermont
What residents of Vermont 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, Vermont Department of Environmental Conservation (VTDEC), CDC · Last reviewed: 2025-01-01
Quick Answer
Is nitrate in drinking water a real concern in Vermont?
Yes — Vermont's dairy farming is the dominant agricultural sector, and manure application from dairy operations can elevate nitrate in groundwater in agricultural areas. Vermont's Act 64 (Clean Water Act) addresses agricultural nutrient management.
Is this mostly a public-water issue, a private-well issue, or both?
Primarily private well users in agricultural areas with dairy farming; public water systems are monitored by VTDEC and generally draw from protected surface water sources.
What is the main reason residents should care?
Vermont's dairy farming — concentrated in the Champlain Valley, the Connecticut River valley, and other agricultural areas — applies significant volumes of manure to cropland. Private wells in dairy farming communities can accumulate nitrate from manure application, particularly in areas with shallow water tables.
Key Facts
| EPA Nitrate MCL | 10 mg/L as N |
| Vermont dairy | Dominant agricultural sector — manure application is the primary nitrate source |
| Act 64 | Vermont's Clean Water Act requires agricultural nutrient management to address nitrogen loading |
| Champlain Valley risk | Addison, Chittenden, Franklin Counties — dairy concentration and private well users |
| State oversight | Vermont Department of Environmental Conservation (VTDEC) |
Why This Matters in Vermont
Vermont's agricultural identity is rooted in dairy farming. The Champlain Valley (Addison, Chittenden, and Franklin Counties) and the Northeast Kingdom (Orleans and Caledonia Counties) have significant concentrations of dairy operations. Manure from dairy cattle applied to hayfields and cropland can leach nitrate into groundwater, particularly in areas with shallow water tables or fracture rock aquifers. Vermont's Act 64, the Vermont Clean Water Act, requires agricultural operations to implement practices that reduce nitrogen and phosphorus runoff — acknowledging the nutrient management challenge. VTDEC monitors public water systems for nitrate compliance. Private well users in dairy farming communities should test annually.
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.
Vermont 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.
How Nitrate Gets Into Drinking Water
Agricultural fertilizer and manure runoff
Nitrogen-based fertilizers and animal waste applied to Vermont 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 Vermont's dairy farming communities — particularly in the Champlain Valley and Northeast Kingdom — should test for nitrate annually. Vermont's state environmental agency and cooperative extension can provide testing resources.
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 Vermont
- 1
Identify your water utility. Use the ZIP lookup below or browse the Vermont 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 Vermont Department of Environmental Conservation (VTDEC)-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
Vermont 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
State Regulator
Vermont Department of Environmental Conservation (VTDEC) ↗