Know Your Environment. Protect Your Health.

Nitrate

Averydale Mutual Water Company

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

23

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.870 ppm550.450 ppm - 1.40 ppm
20190.988 ppm440.450 ppm - 1.70 ppm
20200.944 ppm550.440 ppm - 1.70 ppm
20210.845 ppm440.400 ppm - 1.30 ppm
20220.200 ppm41ND - 0.800 ppm
20231.00 ppm440.730 ppm - 1.80 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
2018-02-06CA1910023_004_004-2018020613300.860 ppm
2018-02-20CA1910023_004_004-2018022014000.950 ppm
2018-07-17CA1910023_003_003-2018071712561.40 ppm
2018-07-17CA1910023_006_006-2018071713280.690 ppm
2018-07-17CA1910023_001_001-2018071713240.450 ppm
2019-02-19CA1910023_004_004-2019021913021.000 ppm
2019-07-30CA1910023_001_001-2019073012410.450 ppm
2019-07-30CA1910023_003_003-2019073012571.70 ppm
2019-08-20CA1910023_006_006-2019082014260.800 ppm
2020-02-18CA1910023_004_004-2020021813050.930 ppm
2020-07-21CA1910023_006_006-2020072113340.440 ppm
2020-07-21CA1910023_001_001-2020072113250.790 ppm
2020-07-21CA1910023_004_004-2020072113150.860 ppm
2020-07-21CA1910023_003_003-2020072113041.70 ppm
2021-02-16CA1910023_004_004-2021021613550.930 ppm
2021-07-20CA1910023_003_003-2021072012471.30 ppm
2021-07-20CA1910023_001_001-2021072013010.400 ppm
2021-07-20CA1910023_006_006-2021072013240.750 ppm
2022-02-22CA1910023_004_004-2022022212580.800 ppm
2022-07-19CA1910023_006_006-202207191326ND
2022-07-19CA1910023_001_001-202207191330ND
2022-07-19CA1910023_003_003-202207191254ND
2023-02-21CA1910023_004_004-2023022112500.750 ppm
2023-07-18CA1910023_006_006-2023071813550.730 ppm
2023-07-18CA1910023_003_003-2023071813381.80 ppm
2023-07-18CA1910023_001_001-2023071813490.730 ppm