Know Your Environment. Protect Your Health.

Nitrite

St. Augustine

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.263 ppm43ND - 0.460 ppm
20190.318 ppm43ND - 0.710 ppm
20200.343 ppm440.190 ppm - 0.440 ppm
20210.380 ppm43ND - 0.860 ppm
20220.403 ppm440.200 ppm - 0.560 ppm
20230.185 ppm43ND - 0.400 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
2018-01-238013532-010.280 ppm
2018-04-238043991-010.310 ppm
2018-07-238074252-01ND
2018-10-188103811-010.460 ppm
2019-01-249013999-010.710 ppm
2019-05-209054043-010.320 ppm
2019-07-169073468-01ND
2019-10-159103326-010.240 ppm
2020-01-140012553-010.320 ppm
2020-04-160043289-010.190 ppm
2020-08-180083937-010.440 ppm
2020-11-050111450-010.420 ppm
2021-02-15EB02619-010.860 ppm
2021-04-13ED02643-010.410 ppm
2021-07-27EG05420-01ND
2021-10-08EJ01846-010.250 ppm
2022-02-08FB01255-010.560 ppm
2022-05-09FE01701-010.390 ppm
2022-07-19FG03454-010.200 ppm
2022-11-15FK03071-010.460 ppm
2023-01-17GA02818-010.400 ppm
2023-04-26GD04330-010.190 ppm
2023-08-14GH03049-01ND
2023-10-24GJ04148-010.150 ppm