Know Your Environment. Protect Your Health.

Nitrite

Williams Bay Waterworks

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.

 

26

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.128 ppm440.0800 ppm - 0.170 ppm
20190.0905 ppm440.0500 ppm - 0.150 ppm
20200.0980 ppm440.0710 ppm - 0.150 ppm
20210.0916 ppm550.0400 ppm - 0.150 ppm
20220.105 ppm440.0780 ppm - 0.120 ppm
20230.115 ppm550.0740 ppm - 0.160 ppm

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
2018-02-141802-3080.170 ppm
2018-06-261806-7610.130 ppm
2018-07-171807-5120.0800 ppm
2018-12-031812-0100.130 ppm
2019-02-191902-4500.150 ppm
2019-06-121906-3390.0700 ppm
2019-07-2411366710.0920 ppm
2019-12-181912-5090.0500 ppm
2020-06-1511934960.0710 ppm
2020-06-1511934950.0710 ppm
2020-08-252008-7590.1000 ppm
2020-10-2812252940.150 ppm
2021-03-102103-3420.0400 ppm
2021-03-102103-3420.0400 ppm
2021-05-1812545740.150 ppm
2021-08-0912702480.0780 ppm
2021-10-1112832330.150 ppm
2022-01-1812965130.0780 ppm
2022-04-1313077790.110 ppm
2022-08-0813284520.120 ppm
2022-12-0713523860.110 ppm
2023-02-07WB00646-010.0740 ppm
2023-06-14WB03531-010.160 ppm
2023-08-23WB05330-030.110 ppm
2023-08-23WB05338-010.110 ppm
2023-11-30WB07639-010.120 ppm