Know Your Environment. Protect Your Health.

Nitrate and nitrite

Candlewood Park 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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

10

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.445 ppm110.445 ppm
20190.588 ppm110.588 ppm
20200.575 ppm110.575 ppm
20210.402 ppm110.402 ppm
20220.517 ppm220.513 ppm - 0.520 ppm
20230.480 ppm440.370 ppm - 0.548 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
2018-05-07420-136351-1-NIT0.445 ppm
2019-11-05420-162811-2-NIT0.588 ppm
2020-11-03420-184418-2-NIT0.575 ppm
2021-05-05420-196698-5-NIT0.402 ppm
2022-05-31420-224969-1-NIT0.520 ppm
2022-06-16AY10393-NIT0.513 ppm
2023-05-02CN95929-NIT0.370 ppm
2023-06-07AZ10246-NIT0.505 ppm
2023-06-07AZ10248-NIT0.497 ppm
2023-12-18AZ22799-NIT0.548 ppm