Know Your Environment. Protect Your Health.

Nitrate and nitrite

Ward II Water District

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.

 

141

Samples

0

Samples exceeding legal limit (MCL)

11

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0500 ppm3610ND - 0.300 ppm
20190.0278 ppm362ND - 0.500 ppm
20200.00556 ppm181ND - 0.1000 ppm
20210.0353 ppm173ND - 0.200 ppm
2022ND170ND
2023ND170ND

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
2018-05-02AE21701ND
2018-05-02AE21725ND
2018-05-02AE21701ND
2018-05-02AE21725ND
2018-06-06AE21807ND
2018-06-06AE21810ND
2018-06-06AE21813ND
2018-06-06AE21816ND
2018-06-06AE21819ND
2018-06-06AE21807ND
2018-06-06AE21810ND
2018-06-06AE21813ND
2018-06-06AE21816ND
2018-06-06AE21819ND
2018-06-25AE21982ND
2018-06-25AE21986ND
2018-06-25AE21990ND
2018-06-25AE21994ND
2018-06-25AE219980.1000 ppm
2018-06-25AE21982ND
2018-06-25AE21986ND
2018-06-25AE21990ND
2018-06-25AE21994ND
2018-06-25AE219980.1000 ppm
2018-09-10B1804157-001ND
2018-09-10B1804157-001ND
2018-10-25B1805173-0010.200 ppm
2018-10-25B1805173-0020.300 ppm
2018-10-25B1805173-0030.200 ppm
2018-10-25B1805173-0040.1000 ppm
2018-10-25B1805173-005ND
2018-10-25B1805173-0010.200 ppm
2018-10-25B1805173-0020.300 ppm
2018-10-25B1805173-0030.200 ppm
2018-10-25B1805173-0040.1000 ppm
2018-10-25B1805173-005ND
2019-03-14B1901201-0010.500 ppm
2019-03-14B1901201-0010.500 ppm
2019-05-29B1902312-001ND
2019-05-29B1902312-002ND
2019-05-29B1902312-003ND
2019-05-29B1902312-004ND
2019-05-29B1902312-005ND
2019-05-29B1902312-006ND
2019-05-29B1902312-007ND
2019-05-29B1902312-008ND
2019-05-29B1902312-009ND
2019-05-29B1902312-010ND
2019-05-29B1902312-011ND
2019-05-29B1902312-012ND
2019-05-29B1902312-013ND
2019-05-29B1902312-014ND
2019-05-29B1902312-015ND
2019-05-29B1902312-016ND
2019-05-29B1902312-001ND
2019-05-29B1902312-002ND
2019-05-29B1902312-003ND
2019-05-29B1902312-004ND
2019-05-29B1902312-005ND
2019-05-29B1902312-006ND
2019-05-29B1902312-007ND
2019-05-29B1902312-008ND
2019-05-29B1902312-009ND
2019-05-29B1902312-010ND
2019-05-29B1902312-011ND
2019-05-29B1902312-012ND
2019-05-29B1902312-013ND
2019-05-29B1902312-014ND
2019-05-29B1902312-015ND
2019-05-29B1902312-016ND
2019-07-24B1903193-001ND
2019-07-24B1903193-001ND
2020-05-28B2002704-001ND
2020-05-28B2002704-002ND
2020-05-28B2002704-0030.1000 ppm
2020-05-28B2002704-004ND
2020-05-28B2002704-005ND
2020-05-28B2002704-006ND
2020-05-28B2002704-007ND
2020-05-28B2002704-008ND
2020-05-28B2002704-009ND
2020-05-28B2002704-010ND
2020-05-28B2002704-011ND
2020-05-28B2002704-012ND
2020-05-28B2002704-013ND
2020-06-23B2002991-001ND
2020-06-23B2002991-002ND
2020-11-18B2006151-001ND
2020-12-02B2006418-001ND
2020-12-18B2006643-001ND
2021-03-29B2101469-004ND
2021-03-29B2101469-005ND
2021-03-29B2101469-006ND
2021-06-14B2102705-0060.200 ppm
2021-06-14B2102705-007ND
2021-06-14B2102705-0080.200 ppm
2021-06-14B2102705-009ND
2021-06-14B2102705-010ND
2021-06-28B2103003-0040.200 ppm
2021-06-28B2103003-005ND
2021-06-28B2103003-006ND
2021-06-28B2103005-001ND
2021-06-28B2103005-002ND
2021-06-28B2103005-003ND
2021-10-19B2105523-001ND
2021-10-19B2105523-002ND
2021-10-19B2105523-003ND
2022-02-09B2200634-001ND
2022-03-21B2201272-001ND
2022-03-21B2201272-002ND
2022-03-21B2201272-003ND
2022-03-21B2201272-004ND
2022-03-21B2201272-006ND
2022-03-21B2201272-007ND
2022-03-21B2201272-008ND
2022-03-21B2201272-009ND
2022-03-21B2201272-010ND
2022-03-21B2201272-011ND
2022-03-21B2201272-012ND
2022-03-21B2201272-013ND
2022-03-21B2201272-014ND
2022-03-21B2201272-015ND
2022-03-21B2201272-016ND
2022-08-22B2203975-002ND
2023-05-08B2301971-006ND
2023-05-08B2301971-007ND
2023-05-08B2301971-008ND
2023-05-08B2301971-009ND
2023-05-08B2301971-010ND
2023-07-26B2302994-001ND
2023-07-26B2302994-002ND
2023-07-26B2302994-003ND
2023-07-26B2302994-004ND
2023-07-26B2302994-005ND
2023-07-26B2302994-006ND
2023-07-26B2302994-007ND
2023-07-26B2302994-008ND
2023-07-26B2302994-009ND
2023-07-26B2302994-010ND
2023-07-26B2302994-011ND
2023-07-26B2302994-012ND