Know Your Environment. Protect Your Health.

Nitrite

San Antonio Water Company

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.

 

20

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND80ND
2019ND10ND
2020ND10ND
2021ND100ND
2022N/A00N/A
2023N/A00N/A

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
2018-07-20CA3610085_004_004-201807201135ND
2018-07-20CA3610085_013_013-201807200900ND
2018-07-20CA3610085_016_016-201807201030ND
2018-07-20CA3610085_018_018-201807200946ND
2018-07-20CA3610085_002_002-201807200951ND
2018-07-20CA3610085_003_003-201807201156ND
2018-07-20CA3610085_017_017-201807200920ND
2018-07-20CA3610085_001_001-201807201100ND
2019-01-04CA3610085_011_011-201901040953ND
2020-04-07CA3610085_021_021-202004071020ND
2021-07-20CA3610085_001_001-202107201036ND
2021-07-20CA3610085_002_002-202107201124ND
2021-07-20CA3610085_013_013-202107200954ND
2021-07-20CA3610085_017_017-202107200943ND
2021-07-20CA3610085_003_003-202107201013ND
2021-07-20CA3610085_011_011-202107200842ND
2021-07-20CA3610085_018_018-202107201130ND
2021-07-27CA3610085_004_004-202107270908ND
2021-07-27CA3610085_021_021-202107271245ND
2021-07-27CA3610085_016_016-202107270810ND