Know Your Environment. Protect Your Health.

Nitrate and nitrite

City of Coeur D Alene

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.886 ppm1110ND - 2.07 ppm
2020N/A00N/A
2021N/A00N/A
20221.29 ppm220.802 ppm - 1.77 ppm
2023N/A00N/A

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
2019-05-23I2041861.85 ppm
2019-05-23I2041892.07 ppm
2019-05-23I2041871.55 ppm
2019-05-29I2042880.450 ppm
2019-05-29I2042870.820 ppm
2019-05-29I204291ND
2019-06-03I2043620.731 ppm
2019-06-03I2043600.582 ppm
2019-06-03I2043610.452 ppm
2019-11-20I1911200510020.428 ppm
2019-11-20I1911200510030.811 ppm
2022-05-02I2405830.802 ppm
2022-08-10I2447601.77 ppm