Know Your Environment. Protect Your Health.

Nitrite

Tud - Tuolumne Water System

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND20ND
2022ND20ND
2023ND20ND

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
2018-08-22CA5510003_003_003-201808220824ND
2018-08-22CA5510003_002_002-201808220810ND
2019-08-13CA5510003_003_003-201908131135ND
2019-08-13CA5510003_002_002-201908131105ND
2020-08-13CA5510003_002_002-202008130940ND
2020-08-13CA5510003_003_003-202008130925ND
2021-08-23CA5510003_003_003-202108231350ND
2021-08-23CA5510003_002_002-202108231405ND
2022-08-10CA5510003_003_003-202208100745ND
2022-08-10CA5510003_002_002-202208100755ND
2023-08-03CA5510003_002_002-202308030855ND
2023-08-03CA5510003_003_003-202308030905ND