Know Your Environment. Protect Your Health.

Nitrate and nitrite

Wbr Public Utilities

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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

2

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND100ND
2019ND100ND
2020ND50ND
20210.0800 ppm52ND - 0.200 ppm
2022ND50ND
2023ND50ND

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
2018-04-06AE21283ND
2018-04-06AE21282ND
2018-04-06AE21279ND
2018-04-06AE21280ND
2018-04-06AE21281ND
2018-04-06AE21282ND
2018-04-06AE21283ND
2018-04-06AE21281ND
2018-04-06AE21280ND
2018-04-06AE21279ND
2019-04-02B1901286-001ND
2019-04-02B1901286-002ND
2019-04-02B1901286-001ND
2019-04-02B1901286-002ND
2019-04-03B1901340-001ND
2019-04-03B1901340-002ND
2019-04-03B1901340-001ND
2019-04-03B1901340-002ND
2019-05-28B1902116-001ND
2019-05-28B1902116-001ND
2020-02-27B2000954-001ND
2020-02-27B2000954-002ND
2020-02-27B2000954-003ND
2020-02-27B2000954-004ND
2020-11-10B2005993-001ND
2021-02-04B2100491-001ND
2021-02-04B2100491-0020.200 ppm
2021-02-04B2100491-003ND
2021-02-04B2100491-0040.200 ppm
2021-02-04B2100491-005ND
2022-04-04B2201653-006ND
2022-04-04B2201653-007ND
2022-04-04B2201653-008ND
2022-04-04B2201653-009ND
2022-04-04B2201653-010ND
2023-10-30B2304692-001ND
2023-10-30B2304692-002ND
2023-10-30B2304692-003ND
2023-10-30B2304692-004ND
2023-10-30B2304692-005ND