Know Your Environment. Protect Your Health.

Nitrate

North Perry Ave 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.

 

46

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.306 ppm91ND - 2.75 ppm
20190.323 ppm91ND - 2.91 ppm
2020N/A00N/A
20210.336 ppm91ND - 3.02 ppm
20220.313 ppm91ND - 2.82 ppm
20230.288 ppm101ND - 2.88 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
2018-07-25ND
2018-07-25ND
2018-07-252.75 ppm
2018-07-25ND
2018-07-25ND
2018-07-25ND
2018-07-25ND
2018-07-25ND
2018-07-25ND
2019-08-13ND
2019-08-13ND
2019-08-13ND
2019-08-13ND
2019-08-13ND
2019-08-13ND
2019-08-132.91 ppm
2019-08-13ND
2019-08-13ND
2021-04-124099191ND
2021-04-124099190ND
2021-04-1240991893.02 ppm
2021-04-124099184ND
2021-04-124099186ND
2021-04-124099192ND
2021-04-124099187ND
2021-04-124099185ND
2021-04-124099188ND
2022-04-224274538ND
2022-08-104357716ND
2022-08-104357506ND
2022-08-104366172ND
2022-08-104346841ND
2022-08-104346833ND
2022-08-104366179ND
2022-08-104332287ND
2022-10-2543715842.82 ppm
2023-04-274448235ND
2023-08-154514776ND
2023-08-154514783ND
2023-08-154514787ND
2023-08-154514785ND
2023-08-1545147752.88 ppm
2023-08-154514777ND
2023-08-154514782ND
2023-08-154514784ND
2023-08-154514786ND