Know Your Environment. Protect Your Health.

Nitrate

Candlewood Park Water District

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

 

18

Samples

0

Samples exceeding legal limit (MCL)

18

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.445 ppm110.445 ppm
20190.588 ppm110.588 ppm
20200.525 ppm440.462 ppm - 0.575 ppm
20210.480 ppm440.402 ppm - 0.537 ppm
20220.494 ppm440.441 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

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

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
2020-01-27AW01792-NIT0.462 ppm
2020-08-27AW16649-NIT0.527 ppm
2020-08-27AW16651-NIT0.535 ppm
2020-11-03420-184418-2-NIT0.575 ppm
2021-04-21AX07611-NIT0.528 ppm
2021-04-21AX07609-NIT0.537 ppm
2021-05-05420-196698-5-NIT0.402 ppm
2021-10-06AX20377-NIT0.453 ppm
2022-05-31420-224969-1-NIT0.520 ppm
2022-06-16AY10389-NIT0.502 ppm
2022-06-16AY10393-NIT0.513 ppm
2022-12-08AY21972-NIT0.441 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