Nitrate in Massachusetts Drinking Water — 22 ZIPs Te...
EPA data analysis for nitrate in Massachusetts drinking water systems
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 | 02571 | Wareham | 90 ppb | 1 ppb | Exceeds |
| 2 | 02576 | West Wareham | 90 ppb | 1 ppb | Exceeds |
| 3 | 02633 | Chatham | 64 ppm | 10 ppm | Exceeds |
| 4 | 02650 | North Chatham | 64 ppm | 10 ppm | Exceeds |
| 5 | 02659 | South Chatham | 64 ppm | 10 ppm | Exceeds |
| 6 | 02669 | West Chatham | 64 ppm | 10 ppm | Exceeds |
| 7 | 01355 | New Salem | 7 mg/L | 10 mg/L | Within Limit |
| 8 | 01364 | Orange | 7 mg/L | 10 mg/L | Within Limit |
| 9 | 01378 | Warwick | 7 mg/L | 10 mg/L | Within Limit |
| 10 | 01469 | Townsend | 7 ppm | 10 ppm | Within Limit |
| 11 | 01474 | West Townsend | 7 ppm | 10 ppm | Within Limit |
| 12 | 01936 | Hamilton | 6.91 ppm | 10 ppm | Within Limit |
| 13 | 01982 | South Hamilton | 6.91 ppm | 10 ppm | Within Limit |
| 14 | 02664 | South Yarmouth | 6.4 ppm | 10 ppm | Within Limit |
| 15 | 02673 | West Yarmouth | 6.4 ppm | 10 ppm | Within Limit |
| 16 | 02675 | Yarmouth Port | 6.4 ppm | 10 ppm | Within Limit |
| 17 | 02072 | Stoughton | 5.38 ppm | 10 ppm | Within Limit |
| 18 | 02038 | Franklin | 5.1 ppm | 10 ppm | Within Limit |
| 19 | 01224 | Berkshire | 1 ppm | 1 ppm | Within Limit |
| 20 | 01226 | Dalton | 1 ppm | 1 ppm | Within Limit |
Lowest Nitrate Levels in Massachusetts
Cities with Nitrate Data in Massachusetts
24 cities in Massachusetts have nitrate testing data available.
+ 4 more cities