Nitrate and nitrite

Lakehaven Utility District

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
2013	N/A	0	0	N/A
2014	0.287 ppm	21	4	ND - 2.60 ppm
2015	0.611 ppm	14	6	ND - 3.10 ppm
2016	0.353 ppm	15	5	ND - 2.40 ppm
2017	0.449 ppm	16	6	ND - 2.00 ppm
2018	0.427 ppm	22	9	ND - 2.20 ppm
2019	1.40 ppm	6	5	ND - 2.47 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
2014-05-06	06656	ND
2014-05-06	06656	ND
2014-05-06	06656	ND
2014-05-06	06655	0.590 ppm
2014-05-13	06994	ND
2014-05-13	06995	ND
2014-05-13	06995	ND
2014-06-03	08008	ND
2014-06-03	08008	ND
2014-07-01	09746	ND
2014-07-08	09986	ND
2014-07-22	11198	ND
2014-07-22	11200	ND
2014-07-22	11199	ND
2014-07-22	11199	ND
2014-07-22	11197	2.60 ppm
2014-07-22	11196	ND
2014-08-05	11969	2.20 ppm
2014-08-05	11970	ND
2014-08-05	11971	0.640 ppm
2014-08-05	11972	ND
2015-02-26	02520	ND
2015-06-16	09186	1.20 ppm
2015-06-23	09746	ND
2015-06-23	09745	ND
2015-06-23	09745	ND
2015-06-23	09745	ND
2015-06-23	09746	ND
2015-07-01	10111	ND
2015-07-01	10114	0.650 ppm
2015-07-01	10115	3.10 ppm
2015-07-01	10113	0.630 ppm
2015-07-01	10112	0.780 ppm
2015-07-01	10110	2.20 ppm
2015-07-21	11458	ND
2016-06-07		0.600 ppm
2016-06-07		ND
2016-06-07		ND
2016-06-07		ND
2016-06-14		2.40 ppm
2016-06-28		ND
2016-07-19		1.30 ppm
2016-07-19		ND
2016-07-26		0.500 ppm
2016-07-26		0.500 ppm
2016-08-09		ND
2016-08-09		ND
2016-09-06		ND
2016-09-06		ND
2016-09-06		ND
2017-05-09		1.70 ppm
2017-05-16		ND
2017-05-16		0.740 ppm
2017-05-23		ND
2017-07-18		ND
2017-07-18		ND
2017-07-18		ND
2017-08-15		ND
2017-08-15		1.50 ppm
2017-09-07		0.620 ppm
2017-09-07		0.620 ppm
2017-09-07		ND
2017-10-03		ND
2017-10-03		ND
2017-11-02		ND
2017-11-16		2.00 ppm
2018-01-11		0.520 ppm
2018-01-17		0.850 ppm
2018-02-27		0.630 ppm
2018-05-08		1.40 ppm
2018-05-08		ND
2018-05-08		ND
2018-05-08		2.20 ppm
2018-05-15		0.550 ppm
2018-06-12		ND
2018-06-12		ND
2018-06-19		ND
2018-06-19		ND
2018-07-10		0.580 ppm
2018-07-10		0.580 ppm
2018-07-17		ND
2018-07-17		ND
2018-07-17		ND
2018-08-08		ND
2018-08-29		ND
2018-08-31		ND
2018-08-31		ND
2018-10-02		2.09 ppm
2019-02-07		2.47 ppm
2019-02-07		0.930 ppm
2019-02-07		1.59 ppm
2019-02-07		2.20 ppm
2019-07-31		1.20 ppm
2019-09-04		ND