Nitrate and nitrite

French Settlement Water Company - French Settlement

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.

MORE ABOUT THIS CONTAMINANT

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	2	0	ND
2015	ND	2	0	ND
2016	ND	2	0	ND
2017	0.0500 ppm	4	2	ND - 0.1000 ppm
2018	0.0500 ppm	8	2	ND - 0.200 ppm
2019	ND	8	0	ND

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The 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
2014-11-05	AD99438	ND
2014-11-05	AD99438	ND
2015-12-14	35221768002	ND
2015-12-14	35221768002	ND
2016-04-11	35239197004	ND
2016-04-11	35239197004	ND
2017-01-13	35289578012	ND
2017-01-13	35291489024	0.1000 ppm
2017-01-13	35291489024	0.1000 ppm
2017-01-13	35289578012	ND
2018-07-24	B1803205-001	ND
2018-07-24	B1803205-001	ND
2018-10-26	B1805175-003	ND
2018-10-26	B1805175-002	0.200 ppm
2018-10-26	B1805175-001	ND
2018-10-26	B1805175-001	ND
2018-10-26	B1805175-002	0.200 ppm
2018-10-26	B1805175-003	ND
2019-02-11	B1900705-001	ND
2019-02-11	B1900705-001	ND
2019-05-28	B1902214-001	ND
2019-05-28	B1902214-002	ND
2019-05-28	B1902214-001	ND
2019-05-28	B1902214-002	ND
2019-11-14	B1905089-001	ND
2019-11-14	B1905089-001	ND