Know Your Environment. Protect Your Health.

Nitrite

Pierson Water Supply

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.

 

73

Samples

1

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.300 ppm52ND - 1.10 ppm
20190.0386 ppm222ND - 0.430 ppm
20200.00400 ppm201ND - 0.0800 ppm
20210.170 ppm85ND - 0.380 ppm
2022ND80ND
20230.0110 ppm101ND - 0.110 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
2018-08-14590812ND
2018-08-145908111.10 ppm
2018-08-175910300.400 ppm
2018-09-17592371ND
2018-09-17592372ND
2019-02-18OE772315ND
2019-02-18OE772316ND
2019-03-12OE780720ND
2019-03-12OE780721ND
2019-04-08OE791829ND
2019-04-08OE791830ND
2019-05-07OE805205ND
2019-05-07OE805216ND
2019-06-04OE817037ND
2019-06-04OE817039ND
2019-07-15OE835298ND
2019-07-15OE835307ND
2019-08-13OE849910ND
2019-08-13OE849911ND
2019-09-04OE860275ND
2019-09-04OE860276ND
2019-10-07OE876243ND
2019-10-07OE8762440.420 ppm
2019-11-18OE895440ND
2019-11-18OE8954410.430 ppm
2019-12-03OE901186ND
2019-12-03OE901187ND
2020-01-06OE913240ND
2020-01-06OE913241ND
2020-02-11OE927407ND
2020-02-11OE927408ND
2020-03-17OE942925ND
2020-03-17OE942926ND
2020-04-20OE966100ND
2020-04-20OE966106ND
2020-05-06OE996713ND
2020-05-06OE996712ND
2020-06-16OE10515790.0800 ppm
2020-06-16OE1051584ND
2020-07-06OE1095265ND
2020-07-06OE1095271ND
2020-08-10OE1169324ND
2020-08-10OE1169325ND
2020-09-15OE1262367ND
2020-09-15OE1262368ND
2020-10-12OE1335239ND
2020-10-12OE1335240ND
2021-01-1221001327-2771500.190 ppm
2021-01-1221001328-2771510.190 ppm
2021-04-1421011655-290911ND
2021-04-1421011656-290912ND
2021-07-0621021671-3029160.380 ppm
2021-07-0621021672-3029180.380 ppm
2021-10-1121034899-318419ND
2021-10-1121034898-3184180.220 ppm
2022-01-1722001843-332826ND
2022-01-1722001844-332827ND
2022-04-0422010398-343373ND
2022-04-0422010399-343374ND
2022-07-1922023743-359462ND
2022-07-1922023744-359467ND
2022-10-1722034974-372784ND
2022-10-1722034975-372785ND
2023-01-1023001007-385127ND
2023-01-1023001006-385126ND
2023-02-2623006669-392032ND
2023-04-1223011871-398349ND
2023-04-1223011872-398351ND
2023-05-1523015434-402709ND
2023-07-1923022785-411568ND
2023-07-1923022786-411569ND
2023-10-2423035028-4263810.110 ppm
2023-10-2423035029-426382ND