Nitrate and nitrite

East Central Bossier 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.

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	4	0	ND
2015	0.0290 ppm	4	2	ND - 0.0580 ppm
2016	ND	4	0	ND
2017	0.0455 ppm	4	4	0.0340 ppm - 0.0570 ppm
2018	0.0490 ppm	2	2	0.0490 ppm
2019	ND	4	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
2014-06-20	AD92692	ND
2014-06-20	AD92691	ND
2014-06-20	AD92692	ND
2014-06-20	AD92691	ND
2015-05-19	35189656006	ND
2015-05-19	35189656007	0.0580 ppm
2015-05-19	35189656007	0.0580 ppm
2015-05-19	35189656006	ND
2016-05-10	35244229002	ND
2016-05-10	35244229003	ND
2016-05-10	35244229002	ND
2016-05-10	35244229003	ND
2017-10-04	35341216009	0.0570 ppm
2017-10-04	35341216008	0.0340 ppm
2017-10-04	35341216008	0.0340 ppm
2017-10-04	35341216009	0.0570 ppm
2018-11-02	35431817001	0.0490 ppm
2018-11-02	35431817001	0.0490 ppm
2019-04-10	35461380001	ND
2019-04-10	35461380002	ND
2019-04-10	35461380001	ND
2019-04-10	35461380002	ND