Know Your Environment. Protect Your Health.

Nitrate and nitrite

New Britain Water Department

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

35

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.362 ppm550.0880 ppm - 0.713 ppm
20190.102 ppm990.0380 ppm - 0.222 ppm
20200.178 ppm990.0560 ppm - 0.375 ppm
20210.157 ppm550.0360 ppm - 0.446 ppm
20220.107 ppm550.0130 ppm - 0.301 ppm
20230.0245 ppm21ND - 0.0490 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL): 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2018-04-16IOCR 2004921500.161 ppm
2018-04-16IOCR 2004921470.206 ppm
2018-04-16IOCR 2004921490.713 ppm
2018-04-16IOCR 2004921480.640 ppm
2018-06-20NOX 2004975340.0880 ppm
2019-04-25NOX 2005296060.0460 ppm
2019-04-25IOCR 200529606B0.0460 ppm
2019-04-25IOCR 200529609E0.119 ppm
2019-04-25NOX 2005296090.119 ppm
2019-04-25NOX 2005296070.0530 ppm
2019-04-25IOCR 200529607C0.0530 ppm
2019-04-25IOCR 200529608D0.222 ppm
2019-04-25NOX 2005296080.222 ppm
2019-06-12NOX 2005359950.0380 ppm
2020-04-22IOCR 2005732670.375 ppm
2020-04-22NOX 2005732670.375 ppm
2020-04-22IOCR 2005732660.134 ppm
2020-04-22IOCR 2005732680.129 ppm
2020-04-22NOX 2005732680.129 ppm
2020-04-22IOCR 2005732650.134 ppm
2020-04-22NOX 2005732650.134 ppm
2020-04-22NOX 2005732660.134 ppm
2020-06-11NOX 2005788920.0560 ppm
2021-04-20IOCR 2006138900.446 ppm
2021-04-20IOCR 2006138890.125 ppm
2021-04-20IOCR 2006138910.0980 ppm
2021-04-20IOCR 2006138880.0800 ppm
2021-06-16NOX 2006212050.0360 ppm
2022-04-20I300172305 3001723070.0130 ppm
2022-04-20I300172334 3001723360.130 ppm
2022-04-20I300172312 3001723140.301 ppm
2022-04-20I300172319 3001723260.0670 ppm
2022-06-28N300204043 3002040460.0230 ppm
2023-04-17N300334310 3003343120.0490 ppm
2023-06-13N300364610 300364612ND