Know Your Environment. Protect Your Health.

Nitrate and nitrite

Lake Wenatchee Water District

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0350 ppm41ND - 0.140 ppm
20190.0583 ppm62ND - 0.230 ppm
2020N/A00N/A
2021ND30ND
20220.0350 ppm41ND - 0.140 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
2018-01-03ND
2018-01-03ND
2018-01-030.140 ppm
2018-04-25ND
2019-01-08ND
2019-01-080.230 ppm
2019-01-080.120 ppm
2019-01-08ND
2019-03-27ND
2019-08-08ND
2021-01-044054975ND
2021-01-044054978ND
2021-01-044054974ND
2022-01-0442229290.140 ppm
2022-01-044222932ND
2022-01-044222924ND
2022-04-044263766ND