Nitrate and nitrite

Bolivar

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	0.105 ppm	4	4	0.0250 ppm - 0.220 ppm
2015	0.0858 ppm	5	4	ND - 0.240 ppm
2016	0.118 ppm	5	4	ND - 0.240 ppm
2017	0.102 ppm	5	4	ND - 0.230 ppm
2018	0.0876 ppm	5	4	ND - 0.240 ppm
2019	0.106 ppm	5	4	ND - 0.270 ppm

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
2014-08-14	AC32013	0.0540 ppm
2014-08-14	AC32012	0.220 ppm
2014-08-18	AC32014	0.0250 ppm
2014-08-18	AC32015	0.120 ppm
2015-01-15	AC40858	ND
2015-01-15	AC40861	0.240 ppm
2015-01-15	AC40859	0.0530 ppm
2015-01-15	AC40860	0.0160 ppm
2015-01-15	AC40862	0.120 ppm
2016-01-20	AC65203	0.140 ppm
2016-01-20	AC65202	ND
2016-01-20	AC65206	0.0600 ppm
2016-01-20	AC65204	0.150 ppm
2016-01-20	AC65205	0.240 ppm
2017-01-19	AC89494	0.230 ppm
2017-01-19	AC89493	0.0840 ppm
2017-01-19	AC89492	0.0550 ppm
2017-01-19	AC89495	ND
2017-01-19	AC89491	0.140 ppm
2018-01-11	AD11602	0.130 ppm
2018-01-11	AD11603	ND
2018-01-11	AD11604	0.240 ppm
2018-01-11	AD11605	0.0470 ppm
2018-01-11	AD11606	0.0210 ppm
2019-01-10	AD37877	ND
2019-01-10	AD37878	0.170 ppm
2019-01-10	AD37879	0.0210 ppm
2019-01-10	AD37880	0.270 ppm
2019-01-10	AD37881	0.0680 ppm