Nitrate and nitrite

Citizens Water of Westfield, LLC

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	0.0343 ppm	7	1	ND - 0.240 ppm
2015	0.0675 ppm	8	2	ND - 0.330 ppm
2016	ND	2	0	ND
2017	ND	6	0	ND
2018	ND	6	0	ND
2019	ND	3	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
2014-05-13	683178N	ND
2014-05-13	683174N	ND
2014-05-13	683176N	0.240 ppm
2014-08-12	696462-01N	ND
2014-08-12	696465-03N	ND
2014-11-11	709898N	ND
2014-11-11	709900N	ND
2015-02-10	722485-01N	ND
2015-02-10	722487-03N	ND
2015-08-11	1500547-01N	0.210 ppm
2015-08-11	1500547-02N	0.330 ppm
2015-09-22	150077005N	ND
2015-11-10	150102303N	ND
2015-11-10	150102301N	ND
2015-11-10	150102304N	ND
2016-08-09	16121406N	ND
2016-08-09	16121405N	ND
2017-05-09	17070711N	ND
2017-05-09	17070713N	ND
2017-05-09	17070715N	ND
2017-08-15	17130613N	ND
2017-08-15	171309611N	ND
2017-08-15	17130612N	ND
2018-05-15	18071801N	ND
2018-05-15	18071802N	ND
2018-06-12	18087906N	ND
2018-08-14	18127401N	ND
2018-08-14	18127402N	ND
2018-08-14	18127403N	ND
2019-05-14	19092608N	ND
2019-05-14	19092609N	ND
2019-05-14	19092610N	ND