Know Your Environment. Protect Your Health.

Nitrate and nitrite

Ponderosa Community Club Inc.

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.

 

14

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.535 ppm220.350 ppm - 0.720 ppm
20190.730 ppm220.330 ppm - 1.13 ppm
2020N/A00N/A
20210.875 ppm220.420 ppm - 1.33 ppm
20220.970 ppm87ND - 1.51 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
2018-04-120.720 ppm
2018-12-200.350 ppm
2019-04-101.13 ppm
2019-04-100.330 ppm
2021-07-2241462630.420 ppm
2021-07-2241462641.33 ppm
2022-07-0543007570.985 ppm
2022-07-054300755ND
2022-07-0543007601.50 ppm
2022-07-0543007560.433 ppm
2022-07-0543007581.50 ppm
2022-07-0543007591.51 ppm
2022-07-1843109021.44 ppm
2022-07-1843109130.393 ppm