Nitrate · Massachusetts

Nitrate in Massachusetts Drinking Water — 22 ZIPs Te...

EPA data analysis for nitrate in Massachusetts drinking water systems

ZipCheckup tracks Nitrate in Massachusetts drinking water: 22 ZIP codes with detected levels on record. 3 ZIP codes exceed the EPA limit (10 mg/L (as nitrogen)). Nitrate carries a high health-risk designation.

22
ZIPs with Detections
3
ZIPs with Violations
0.4%
Violation Rate
10 mg/L (as nitrogen)
EPA Limit
High
Health Risk
Reverse Osmosis or Ion Exchange
Best Filter Method

Nitrate Contamination in Massachusetts

ZipCheckup analyzed drinking water data across 695 ZIP codes in Massachusetts for nitrate contamination. 22 ZIP codes have reported nitrate detections, and 3 have EPA violations on record.

The violation rate for nitrate in Massachusetts is 0.4% of all ZIP codes — lower than the national average.

EPA Standard for Nitrate

The EPA maximum contaminant level (MCL) for nitrate is 10 mg/L (as nitrogen), governed by the National Primary Drinking Water Regulations. Water systems that exceed this limit must take corrective action and notify consumers.

Worst ZIP Codes for Nitrate in Massachusetts

These ZIP codes reported the highest nitrate levels in Massachusetts based on CCR reports and EPA data:

Lowest Nitrate Levels in Massachusetts

These ZIP codes had the lowest reported nitrate detections in Massachusetts:

Health Effects of Nitrate

How to Remove Nitrate From Drinking Water

The most effective treatment for nitrate removal is Reverse Osmosis or Ion Exchange. Look for filters certified under NSF 53 / NSF 58 standards.

Check Your ZIP Code

Use the ZipCheckup water quality search to see nitrate data for your specific water system in Massachusetts.

Worst ZIP Codes for Nitrate in Massachusetts

Ranked by highest nitrate detection level.

Rank ZIP Code City Level Detected EPA Limit Status
1 02633 Chatham 64000 ppb 10000 ppb Exceeds
2 02650 North Chatham 64000 ppb 10000 ppb Exceeds
3 02659 South Chatham 64000 ppb 10000 ppb Exceeds
4 02669 West Chatham 64000 ppb 10000 ppb Exceeds
5 01355 New Salem 7000 ppb 10000 ppb Within Limit
6 01364 Orange 7000 ppb 10000 ppb Within Limit
7 01378 Warwick 7000 ppb 10000 ppb Within Limit
8 01469 Townsend 7000 ppb 10000 ppb Within Limit
9 01474 West Townsend 7000 ppb 10000 ppb Within Limit
10 01936 Hamilton 6910 ppb 10000 ppb Within Limit
11 01982 South Hamilton 6910 ppb 10000 ppb Within Limit
12 02664 South Yarmouth 6400 ppb 10000 ppb Within Limit
13 02673 West Yarmouth 6400 ppb 10000 ppb Within Limit
14 02675 Yarmouth Port 6400 ppb 10000 ppb Within Limit
15 02072 Stoughton 5380 ppb 10000 ppb Within Limit
16 02038 Franklin 5100 ppb 10000 ppb Within Limit
17 01224 Berkshire 1000 ppb 10000 ppb Within Limit
18 01226 Dalton 1000 ppb 10000 ppb Within Limit
19 01227 Dalton 1000 ppb 10000 ppb Within Limit
20 01237 Lanesboro 1000 ppb 10000 ppb Within Limit

Lowest Nitrate Levels in Massachusetts

ZIP Code City Level Detected
02576 West Wareham 90 ppb
02571 Wareham 90 ppb
01237 Lanesboro 1000 ppb
01227 Dalton 1000 ppb
01226 Dalton 1000 ppb
01224 Berkshire 1000 ppb
02038 Franklin 5100 ppb
02072 Stoughton 5380 ppb
02675 Yarmouth Port 6400 ppb
02673 West Yarmouth 6400 ppb

Cities with Nitrate Data in Massachusetts

24 cities in Massachusetts have nitrate testing data available.

+ 4 more cities

Massachusetts Water Quality Overview: See statewide water quality rankings on the Massachusetts water quality page.
Learn more about Nitrate: Read the full guide on Nitrate in drinking water.
Home → Contaminants → Nitrate → Massachusetts

How to cite this page

APA ZipCheckup. (2026). Nitrate in Massachusetts Drinking Water — 22 ZIPs Te.... https://zipcheckup.com/contaminants/nitrates/massachusetts/
BibTeX 
@misc{zipcheckup-contaminants-nitrates-massachusetts,
  author = {{ZipCheckup}},
  title  = {{Nitrate in Massachusetts Drinking Water — 22 ZIPs Te...}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/nitrates/massachusetts/}
}

Data as of July 2026.

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