Nitrate and nitrite

Camino Real Regional Utility Authority

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	1.04 ppm	5	2	ND - 3.40 ppm
2015	ND	5	0	ND
2016	0.360 ppm	5	1	ND - 1.80 ppm
2017	0.145 ppm	4	1	ND - 0.580 ppm
2018	0.153 ppm	4	1	ND - 0.610 ppm
2019	0.313 ppm	4	2	ND - 0.670 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
2014-02-18	1402871-003A	ND
2014-02-18	1402874-003A	1.80 ppm
2014-02-18	1402869-003A	ND
2014-02-18	1402866-003A	ND
2014-05-21	1405A43-003A	3.40 ppm
2015-01-13	1501683-001A	ND
2015-01-13	1501738-001A	ND
2015-01-13	1501685-002A	ND
2015-01-13	1501701-001A	ND
2015-01-13	1501739-001A	ND
2016-02-17	1602898-001A	ND
2016-02-17	1602900-001A	ND
2016-02-17	1602899-001A	1.80 ppm
2016-02-17	1602901-001A	ND
2016-02-18	1602894-002A	ND
2017-02-08	1702462-003	ND
2017-02-08	1702467-003	ND
2017-02-08	1702464-003	0.580 ppm
2017-03-01	1703086-003	ND
2018-01-30	1802072-001	ND
2018-01-30	1802074-001	ND
2018-01-30	1802152-001	0.610 ppm
2018-01-30	1802153-002	ND
2019-02-14	1902784-002	ND
2019-02-14	1902801-001	0.670 ppm
2019-07-11	1907A06-001	0.580 ppm
2019-07-11	1907A07-001	ND