Know Your Environment. Protect Your Health.

Nitrate and nitrite

New Iberia Water System (lAWCO)

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.

 

29

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND180ND
20190.0155 ppm42ND - 0.0310 ppm
2020ND10ND
20210.0500 ppm41ND - 0.200 ppm
2022ND10ND
2023ND10ND

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
2018-02-15AE20669ND
2018-02-15AE20669ND
2018-06-26AE22009ND
2018-06-26AE22006ND
2018-06-26AE22009ND
2018-06-26AE22006ND
2018-10-12B1804883-004ND
2018-10-12B1804883-005ND
2018-10-12B1804883-003ND
2018-10-12B1804883-002ND
2018-10-12B1804883-001ND
2018-10-12B1804883-001ND
2018-10-12B1804883-002ND
2018-10-12B1804883-003ND
2018-10-12B1804883-004ND
2018-10-12B1804883-005ND
2018-11-08B1805338-001ND
2018-11-08B1805338-001ND
2019-01-28B1900362-001ND
2019-01-28B1900362-001ND
2019-01-28354450260010.0310 ppm
2019-01-28354450260010.0310 ppm
2020-02-0635529483001ND
2021-03-15B2101151-001ND
2021-05-03B2102116-002ND
2021-07-20B2103287-0060.200 ppm
2021-10-19B2105504-002ND
2022-02-15B2200644-002ND
2023-03-10B2301048-001ND