Know Your Environment. Protect Your Health.

Nitrate and nitrite

Lexington & Joseph Harp Correctional Institution

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

 

35

Samples

0

Samples exceeding legal limit (MCL)

13

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.185 ppm64ND - 0.480 ppm
20190.201 ppm75ND - 0.510 ppm
20200.180 ppm64ND - 0.500 ppm
2021ND60ND
20220.118 ppm54ND - 0.250 ppm
20230.102 ppm53ND - 0.210 ppm

ppm = parts per million

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.14 ppm

The EWG health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL): 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2018-05-30SDWA-1260010-00ND
2018-05-30SDWA-1260012-000.120 ppm
2018-05-30SDWA-1260014-000.260 ppm
2018-05-30SDWA-1260016-00ND
2018-05-30SDWA-1260018-000.480 ppm
2018-06-15SDWA-1273421-000.250 ppm
2019-02-06SDWA-1338919-00ND
2019-03-06SDWA-1356216-000.250 ppm
2019-03-06SDWA-1356218-000.120 ppm
2019-03-06SDWA-1356220-000.270 ppm
2019-03-06SDWA-1356222-00ND
2019-03-06SDWA-1356224-000.510 ppm
2019-05-06SDWA-1372692-000.260 ppm
2020-02-11SDWA-1460637-000.110 ppm
2020-02-11SDWA-1460639-000.500 ppm
2020-02-11SDWA-1460635-000.300 ppm
2020-02-11SDWA-1460631-000.170 ppm
2020-02-11SDWA-1460629-00ND
2020-02-11SDWA-1460633-00ND
2021-02-24SDWA-1556999-00ND
2021-02-24SDWA-1557001-00ND
2021-02-24SDWA-1557003-00ND
2021-02-24SDWA-1557005-00ND
2021-02-24SDWA-1557007-00ND
2021-02-24SDWA-1557009-00ND
2022-01-12SDWA-1666109-00ND
2022-01-12SDWA-1666117-000.110 ppm
2022-01-12SDWA-1666115-000.250 ppm
2022-01-12SDWA-1666113-000.110 ppm
2022-01-12SDWA-1666111-000.120 ppm
2023-02-01SDWA-1766808-00ND
2023-02-01SDWA-1766815-000.120 ppm
2023-02-01SDWA-1766817-000.180 ppm
2023-02-01SDWA-1766823-000.210 ppm
2023-02-01SDWA-1766829-00ND