Nitrate and nitrite

Shady Oaks Estates Water System

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	4	0	ND
2015	0.0870 ppm	2	2	0.0870 ppm
2016	0.0150 ppm	6	2	ND - 0.0450 ppm
2017	ND	4	0	ND
2018	ND	2	0	ND
2019	0.0905 ppm	4	4	0.0810 ppm - 0.1000 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
2014-08-25	AD95754	ND
2014-08-25	AD95754	ND
2014-10-27	AD98941	ND
2014-10-27	AD98941	ND
2015-06-24	35195538015	0.0870 ppm
2015-06-24	35195538015	0.0870 ppm
2016-04-20	35240507005	ND
2016-04-20	35240507006	0.0450 ppm
2016-04-20	35240507005	ND
2016-04-20	35240507006	0.0450 ppm
2016-10-27	35274955008	ND
2016-10-27	35274955008	ND
2017-01-31	35293758012	ND
2017-01-31	35293758012	ND
2017-07-31	AE16197	ND
2017-07-31	AE16197	ND
2018-01-31	AE20649	ND
2018-01-31	AE20649	ND
2019-01-22	35444142001	0.0810 ppm
2019-01-22	35444142001	0.0810 ppm
2019-02-04	B1900482-001	0.1000 ppm
2019-02-04	B1900482-001	0.1000 ppm