Know Your Environment. Protect Your Health.

Nitrate and nitrite

Village of Simpson Water System

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0310 ppm220.0310 ppm
2019ND40ND
20200.0330 ppm110.0330 ppm
2021ND10ND
2022ND10ND
20230.1000 ppm110.1000 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
2018-12-04354358110010.0310 ppm
2018-12-04354358110010.0310 ppm
2019-05-14B1901963-001ND
2019-05-14B1901963-002ND
2019-05-14B1901963-001ND
2019-05-14B1901963-002ND
2020-11-12355921690010.0330 ppm
2021-10-20B2105620-001ND
2022-05-03B2202120-003ND
2023-02-20B2300763-0010.1000 ppm