Nitrate and nitrite

Grandwood Park Subdivision - Lake Co. Pw

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	ND	5	0	ND
2016	0.554 ppm	1	1	0.554 ppm
2017	ND	1	0	ND
2018	ND	9	0	ND
2019	0.0409 ppm	7	1	ND - 0.286 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
2014-05-28	140527M023	ND
2014-07-14	140715J003	ND
2015-07-22	150722K097	ND
2015-07-22	150722K098	ND
2015-07-22	150722K100	ND
2015-07-22	150722K101	ND
2015-07-22	150722K102	ND
2017-04-05	17D0059-01	ND
2018-01-09	18A0120-01_02	ND
2018-07-12	18G0190-01	ND
2018-07-12	18G0190-02	ND
2018-07-12	18G0190-03	ND
2018-07-12	18G0190-04	ND
2018-07-18	18G0293-01	ND
2018-07-18	18G0293-02	ND
2018-07-18	18G0293-03	ND
2018-10-03	18J0179-01_02	ND
2019-07-17	19G0319-01	ND
2019-07-17	19G0319-02	ND
2019-07-17	19G0319-03	ND
2019-07-17	19G0319-04	0.286 ppm
2019-07-25	19G0465-01	ND
2019-07-25	19G0465-02	ND
2019-08-14	19H0266-01	ND