Know Your Environment. Protect Your Health.

Nitrate and nitrite

Avon Water Company

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.

 

42

Samples

0

Samples exceeding legal limit (MCL)

42

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.00 ppm770.804 ppm - 4.04 ppm
20191.91 ppm770.636 ppm - 4.16 ppm
20201.90 ppm770.786 ppm - 3.66 ppm
20211.93 ppm770.684 ppm - 3.69 ppm
20221.95 ppm770.560 ppm - 3.90 ppm
20231.75 ppm770.770 ppm - 3.09 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
2018-03-05D8C0238-03NOX0.940 ppm
2018-03-05D8C0238-04NOX4.04 ppm
2018-03-05D8C0238-05NOX1.51 ppm
2018-03-05D8C0238-06NOX0.917 ppm
2018-03-05D8C0238-07NOX3.12 ppm
2018-03-05D8C0238-08NOX0.804 ppm
2018-03-05D8C0238-02NOX2.66 ppm
2019-01-29NOX 2005199951.04 ppm
2019-01-29NOX 2005199943.00 ppm
2019-01-29NOX 2005199960.636 ppm
2019-01-29NOX 2005199911.31 ppm
2019-01-29NOX 2005199934.16 ppm
2019-01-29NOX 2005199920.958 ppm
2019-08-06NOX 2005437332.27 ppm
2020-07-20NOX 2005832812.76 ppm
2020-07-20NOX 2005832831.02 ppm
2020-07-20NOX 2005832843.66 ppm
2020-07-20NOX 2005832851.06 ppm
2020-07-20NOX 2005832863.21 ppm
2020-07-20NOX 2005832870.786 ppm
2020-10-27NOX 2005955580.790 ppm
2021-04-13NOX 2006130401.08 ppm
2021-04-13NOX 2006130450.983 ppm
2021-04-13NOX 2006130443.04 ppm
2021-04-13NOX 2006130423.69 ppm
2021-04-13NOX 2006130431.41 ppm
2021-06-01NOX 2006190662.59 ppm
2021-06-01NOX 2006197130.684 ppm
2022-01-17CK177751.05 ppm
2022-01-17CK177763.90 ppm
2022-01-17CK177773.38 ppm
2022-01-17CK177780.950 ppm
2022-03-14CK867750.560 ppm
2022-03-28CK963582.72 ppm
2022-03-28CK963591.09 ppm
2023-01-24CN291790.990 ppm
2023-01-24CN291803.09 ppm
2023-01-24CN291811.09 ppm
2023-01-24CN291820.840 ppm
2023-01-24CN291833.09 ppm
2023-01-24CN291840.770 ppm
2023-09-21CP056122.36 ppm