Know Your Environment. Protect Your Health.

Nitrate and nitrite

City of Hammond 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.

 

40

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.0200 ppm102ND - 0.1000 ppm
20190.0400 ppm104ND - 0.1000 ppm
20200.0400 ppm52ND - 0.1000 ppm
20210.200 ppm550.200 ppm
2022ND50ND
20230.0600 ppm51ND - 0.300 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
2018-02-19AE20685ND
2018-02-19AE20682ND
2018-02-19AE20679ND
2018-02-19AE20676ND
2018-02-19AE20676ND
2018-02-19AE20679ND
2018-02-19AE20682ND
2018-02-19AE20685ND
2018-06-27B1802964-0010.1000 ppm
2018-06-27B1802964-0010.1000 ppm
2019-04-11B1901533-001ND
2019-04-11B1901533-004ND
2019-04-11B1901533-0030.1000 ppm
2019-04-11B1901533-0020.1000 ppm
2019-04-11B1901533-001ND
2019-04-11B1901533-004ND
2019-04-11B1901533-0030.1000 ppm
2019-04-11B1901533-0020.1000 ppm
2019-07-23B1903189-001ND
2019-07-23B1903189-001ND
2020-04-27B2001997-0010.1000 ppm
2020-04-27B2001997-005ND
2020-04-27B2001997-0040.1000 ppm
2020-04-27B2001997-002ND
2020-04-27B2001997-003ND
2021-01-19B2100164-0050.200 ppm
2021-01-19B2100164-0060.200 ppm
2021-01-19B2100164-0070.200 ppm
2021-01-19B2100164-0080.200 ppm
2021-01-19B2100164-0090.200 ppm
2022-02-14B2200631-002ND
2022-02-22B2200774-002ND
2022-02-22B2200774-004ND
2022-02-22B2200774-003ND
2022-02-22B2200774-001ND
2023-05-24B2302192-001ND
2023-05-24B2302192-002ND
2023-05-24B2302192-003ND
2023-05-24B2302192-004ND
2023-07-25B2302979-0010.300 ppm