Know Your Environment. Protect Your Health.

Nitrate and nitrite

Oakdale Heights Association 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
20181.18 ppm221.07 ppm - 1.29 ppm
20190.860 ppm220.840 ppm - 0.880 ppm
20200.810 ppm220.760 ppm - 0.860 ppm
20210.780 ppm440.770 ppm - 0.790 ppm
20220.780 ppm220.780 ppm
20230.425 ppm21ND - 0.850 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
2018-04-04CA13663NOX1.29 ppm
2018-04-04CA13664NOX1.07 ppm
2019-10-04CE273950.880 ppm
2019-10-10CE392220.840 ppm
2020-01-17CF151810.760 ppm
2020-01-17CF151820.860 ppm
2021-01-14CH465970.780 ppm
2021-01-14CH465990.780 ppm
2021-01-14CH466000.770 ppm
2021-01-14CH465980.790 ppm
2022-01-19CK194080.780 ppm
2022-01-19CK194090.780 ppm
2023-01-05CN174790.850 ppm
2023-01-05CN17480ND