Nitrate and nitrite

Tallulah 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	2	0	ND
2015	0.0290 ppm	4	2	ND - 0.0580 ppm
2016	0.00960 ppm	10	2	ND - 0.0480 ppm
2017	0.120 ppm	2	2	0.120 ppm
2018	0.0635 ppm	8	8	0.0560 ppm - 0.0710 ppm
2019	ND	2	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
2014-12-17	AE00726	ND
2014-12-17	AE00726	ND
2015-05-13	35189659003	0.0580 ppm
2015-05-13	35189659003	0.0580 ppm
2015-09-04	35207972008	ND
2015-09-04	35207972008	ND
2016-02-23	35231300003	ND
2016-02-23	35231300001	ND
2016-02-23	35231300002	ND
2016-02-23	35231300003	ND
2016-02-23	35231300004	ND
2016-02-23	35231300002	ND
2016-02-23	35231300001	ND
2016-02-23	35231300004	ND
2016-12-02	35282272025	0.0480 ppm
2016-12-02	35282272025	0.0480 ppm
2017-03-06	35300115007	0.120 ppm
2017-03-06	35300115007	0.120 ppm
2018-10-22	35426078002	0.0710 ppm
2018-10-22	35426078005	0.0560 ppm
2018-10-22	35426078004	0.0610 ppm
2018-10-22	35426078003	0.0660 ppm
2018-10-22	35426078002	0.0710 ppm
2018-10-22	35426078005	0.0560 ppm
2018-10-22	35426078004	0.0610 ppm
2018-10-22	35426078003	0.0660 ppm
2019-01-10	35441783001	ND
2019-01-10	35441783001	ND