Know Your Environment. Protect Your Health.

Nitrate and nitrite

Sandy Pointe Lake Development

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.

 

28

Samples

0

Samples exceeding legal limit (MCL)

4

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0993 ppm83ND - 0.274 ppm
2019ND60ND
2020ND50ND
2021ND30ND
20220.730 ppm31ND - 2.19 ppm
2023ND30ND

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
2018-01-245315780.261 ppm
2018-01-24531577ND
2018-04-25545652ND
2018-04-255456510.259 ppm
2018-08-165630710.274 ppm
2018-08-16563070ND
2018-11-26579048ND
2018-11-26579047ND
2019-01-29591637ND
2019-01-29591638ND
2019-04-29604402ND
2019-04-29604403ND
2019-08-19620187ND
2019-08-19620188ND
2020-04-14670059ND
2020-07-28681946ND
2020-08-31683924ND
2020-08-31683925ND
2020-11-17701944ND
2021-01-29716325ND
2021-09-29746340ND
2021-09-29746341ND
2022-03-22780584ND
2022-09-228124352.19 ppm
2022-09-22812434ND
2023-04-10843246ND
2023-09-20874939ND
2023-09-20874940ND