Know Your Environment. Protect Your Health.

Nitrate and nitrite

West Winn Water System Inc.

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0270 ppm42ND - 0.0540 ppm
20190.0305 ppm42ND - 0.0610 ppm
20200.0143 ppm71ND - 0.1000 ppm
20210.0500 ppm21ND - 0.1000 ppm
2022ND20ND
20230.0500 ppm21ND - 0.1000 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
2018-10-31354286920010.0540 ppm
2018-10-3135428692002ND
2018-10-31354286920010.0540 ppm
2018-10-3135428692002ND
2019-05-2235470873002ND
2019-05-22354708730010.0610 ppm
2019-05-2235470873002ND
2019-05-22354708730010.0610 ppm
2020-01-08B2000112-001ND
2020-01-08B2000112-005ND
2020-01-08B2000112-004ND
2020-01-08B2000112-003ND
2020-01-08B2000112-002ND
2020-12-08B2006516-0020.1000 ppm
2020-12-08B2006516-001ND
2021-11-04B2105923-0020.1000 ppm
2021-12-20B2106781-001ND
2022-07-06B2203301-001ND
2022-07-06B2203301-002ND
2023-01-10B2300108-006ND
2023-01-10B2300108-0070.1000 ppm