Is nitrate a problem in Connecticut drinking water?

Nitrate was detected above the EPA limit of 10 mg/L (as nitrogen) in 2 ZIP codes across Connecticut. Check the table above for specific areas. Consider Reverse Osmosis or Ion Exchange if your ZIP is affected.

How widespread is nitrate in Connecticut water?

No nitrate detections were reported in Connecticut in current EPA data. Monitoring data is updated periodically.

Nitrate · Connecticut

Nitrate in Connecticut Drinking Water — 2 Violations

EPA data analysis for nitrate in Connecticut drinking water systems

ZipCheckup tracks Nitrate in Connecticut drinking water: 0 ZIP codes with detected levels on record. 2 ZIP codes exceed the EPA limit (10 mg/L (as nitrogen)). Nitrate carries a high health-risk designation.

ZIPs with Violations

0.5%

Violation Rate

10 mg/L (as nitrogen)

EPA Limit

High

Health Risk

Reverse Osmosis or Ion Exchange

Best Filter Method

Nitrate Contamination in Connecticut

ZipCheckup analyzed EPA enforcement records across 433 ZIP codes in Connecticut. 2 ZIP codes have nitrate-related violations on record.

The violation rate for nitrate in Connecticut is 0.5% 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.

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 Connecticut.

Connecticut Water Quality Overview: See statewide water quality rankings on the Connecticut water quality page.

Learn more about Nitrate: Read the full guide on Nitrate in drinking water.

Home → Contaminants → Nitrate → Connecticut

How to cite this page

APA

ZipCheckup. (2026). Nitrate in Connecticut Drinking Water — 2 Violations. https://zipcheckup.com/contaminants/nitrates/connecticut/

BibTeX

@misc{zipcheckup-contaminants-nitrates-connecticut,
  author = {{ZipCheckup}},
  title  = {{Nitrate in Connecticut Drinking Water — 2 Violations}},
  year   = {2026},
  url    = {https://zipcheckup.com/contaminants/nitrates/connecticut/}
}

Data as of July 2026.