Know Your Environment. Protect Your Health.

Nitrate and nitrite

Denali - Rock Creek Hq.

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.

 

7

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.572 ppm110.572 ppm
20190.568 ppm110.568 ppm
20200.504 ppm110.504 ppm
20210.710 ppm220.710 ppm
2022ND10ND
20230.780 ppm110.780 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
2018-07-18IN*F1807095-01A0.572 ppm
2019-07-23ARS6-19-00717-0010.568 ppm
2020-09-22ARS6-20-00825-0010.504 ppm
2021-08-02PEF69186-NO30.710 ppm
2021-08-02PEF69186-NO3-20.710 ppm
2022-11-29PEF81038-NO3ND
2023-07-10PEF86675-NO30.780 ppm