Know Your Environment. Protect Your Health.

Nitrate and nitrite

Crystal Springs Water Company

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.391 ppm110.391 ppm
20190.354 ppm110.354 ppm
20200.282 ppm110.282 ppm
2021ND10ND
20220.390 ppm110.390 ppm
20230.480 ppm110.480 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
2018-12-17J8L1183-010.391 ppm
2019-12-17J9L1012-010.354 ppm
2020-08-12JOH0921-050.282 ppm
2021-08-23J1H1434ND
2022-07-1322-005341NIT0.390 ppm
2023-09-1323-007194NIT0.480 ppm