Know Your Environment. Protect Your Health.

Nitrite

Pennsylvania American Royersford

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND110ND
2020ND140ND
2021ND120ND
2022ND110ND
2023ND110ND

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EPA Maximum Contaminant
Level (MCL): 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2018-01-0938161801ND
2018-01-0938162701ND
2018-01-0938162801ND
2018-04-1139073601ND
2018-04-1139073101ND
2018-04-1139074401ND
2018-07-1040207901ND
2018-10-0841311801ND
2019-01-0842500101ND
2019-01-0842501001ND
2019-04-1644166401ND
2019-04-1644166301ND
2019-04-1644166201ND
2019-04-2342501101ND
2019-07-0845018801ND
2019-09-0546200301ND
2019-09-0546200401ND
2019-10-1046832501ND
2019-11-0547365301ND
2020-01-0821497102.00ND
2020-01-0821497100.00ND
2020-02-1121661306.00ND
2020-02-1121661308.00ND
2020-04-0222016121.00ND
2020-04-0222016165.00ND
2020-05-0722208662.00ND
2020-05-0722208660.00ND
2020-07-0122601581.00ND
2020-08-0522792331.00ND
2020-08-1122792329.00ND
2020-10-1523176675.00ND
2020-11-0523356281.00ND
2020-11-0523356279.00ND
2021-01-0723706408.00ND
2021-01-0723706406.00ND
2021-02-0823882959.00ND
2021-02-0823882961.00ND
2021-04-0124241259.00ND
2021-04-0124241303.00ND
2021-05-0624431959.00ND
2021-05-0624431957.00ND
2021-07-0624822195.00ND
2021-08-1125016508.00ND
2021-10-1425398574.00ND
2021-11-1125582449.00ND
2022-01-0625936148.00ND
2022-01-0625936146.00ND
2022-02-1726111856.00ND
2022-02-1726111858.00ND
2022-04-1426458186.00ND
2022-04-1426458185.00ND
2022-05-1226641712.00ND
2022-07-1927031051.00ND
2022-08-0327227901.00ND
2022-10-0627635746.00ND
2022-11-0927817072.00ND
2023-01-0528166738.00ND
2023-01-0528166736.00ND
2023-02-1628344108.00ND
2023-02-1628344105.00ND
2023-04-1928695864.00ND
2023-04-1928695862.00ND
2023-05-1128893320.00ND
2023-07-0629296057.00ND
2023-08-1029491169.00ND
2023-10-0529881059.00ND
2023-11-1430065643.00ND