Know Your Environment. Protect Your Health.

Nitrate and nitrite

Ruston Water System

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.

 

86

Samples

0

Samples exceeding legal limit (MCL)

3

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0110 ppm202ND - 0.110 ppm
20190.00660 ppm202ND - 0.0660 ppm
20200.0500 ppm205ND - 0.500 ppm
20210.0444 ppm91ND - 0.400 ppm
2022ND80ND
20230.0222 ppm92ND - 0.1000 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
2018-09-0435417972005ND
2018-09-0435417972003ND
2018-09-0435417972002ND
2018-09-0435417972001ND
2018-09-0435417972004ND
2018-09-0435417972005ND
2018-09-0435417972004ND
2018-09-0435417972003ND
2018-09-0435417972002ND
2018-09-0435417972001ND
2018-10-1635424738005ND
2018-10-1635424738005ND
2018-10-16354247380060.110 ppm
2018-10-1635424738007ND
2018-10-16354247380060.110 ppm
2018-10-1635424738007ND
2018-10-2935427799002ND
2018-10-2935427799002ND
2018-10-2935427799001ND
2018-10-2935427799001ND
2019-05-1435469359001ND
2019-05-14354693590020.0660 ppm
2019-05-1435469359003ND
2019-05-1435469359001ND
2019-05-14354693590020.0660 ppm
2019-05-1435469359003ND
2019-05-1435469359004ND
2019-05-1435469359005ND
2019-05-1435469359004ND
2019-05-1435469359005ND
2019-05-2935471701002ND
2019-05-2935471701001ND
2019-05-2935471701003ND
2019-05-2935471701002ND
2019-05-2935471701001ND
2019-05-2935471701003ND
2019-10-2335507184002ND
2019-10-2335507184001ND
2019-10-2335507184002ND
2019-10-2335507184001ND
2020-01-06B2000117-001ND
2020-01-13B2000162-008ND
2020-01-13B2000162-007ND
2020-01-13B2000162-006ND
2020-01-13B2000162-005ND
2020-01-13B2000162-004ND
2020-01-13B2000162-003ND
2020-01-13B2000162-0020.200 ppm
2020-01-13B2000162-001ND
2020-06-22B2003015-001ND
2020-06-22B2003015-0020.1000 ppm
2020-11-17B2006148-0040.500 ppm
2020-11-17B2006148-008ND
2020-11-17B2006148-007ND
2020-11-17B2006148-0060.1000 ppm
2020-11-17B2006148-005ND
2020-11-17B2006148-0030.1000 ppm
2020-11-17B2006148-002ND
2020-11-17B2006148-001ND
2020-11-17B2006148-009ND
2021-12-28B2200087-003ND
2021-12-28B2200087-009ND
2021-12-28B2200087-008ND
2021-12-28B2200087-007ND
2021-12-28B2200087-006ND
2021-12-28B2200087-005ND
2021-12-28B2200087-0040.400 ppm
2021-12-28B2200087-002ND
2021-12-28B2200087-001ND
2022-03-28B2201643-001ND
2022-03-28B2201643-008ND
2022-03-28B2201643-007ND
2022-03-28B2201643-006ND
2022-03-28B2201643-005ND
2022-03-28B2201643-004ND
2022-03-28B2201643-003ND
2022-03-28B2201643-002ND
2023-02-27B2300832-006ND
2023-02-27B2300832-007ND
2023-02-27B2300832-0080.1000 ppm
2023-02-27B2300832-009ND
2023-03-06B2300980-0060.1000 ppm
2023-03-06B2300980-007ND
2023-03-06B2300980-008ND
2023-03-06B2300980-009ND
2023-03-06B2300980-010ND