Know Your Environment. Protect Your Health.

Nitrate and nitrite

Nichols Town

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.

 

5

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.445 ppm110.445 ppm
20190.527 ppm110.527 ppm
2020N/A00N/A
2021ND10ND
20220.618 ppm110.618 ppm
20230.403 ppm110.403 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
2018-07-10S8G0222-20.445 ppm
2019-08-13S9G02690.527 ppm
2021-12-10S1L0332ND
2022-09-06S2L0218-0010.618 ppm
2023-09-25S3I00410.403 ppm