Nitrite

Twin Maples Nursing Home

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

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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	0.0125 ppm	4	2	ND - 0.0300 ppm
2015	0.00425 ppm	4	2	ND - 0.0120 ppm
2016	ND	4	0	ND
2017	ND	5	0	ND
2018	ND	4	0	ND
2019	ND	5	0	ND

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date	Lab ID	Result
2014-01-08	BF96104NOX	ND
2014-04-18	BG34608NOX	0.0200 ppm
2014-09-16	BH14175NOX	0.0300 ppm
2014-10-09	BH25453NOX	ND
2015-02-13	BH73490NOX	ND
2015-04-02	BH91364NOX	ND
2015-07-10	BJ44758NOX	0.00500 ppm
2015-10-26	BK13472NOX	0.0120 ppm
2016-01-19	BK54393NOX	ND
2016-04-22	BN18473NOX	ND
2016-07-07	BN68661NOX	ND
2016-10-14	BV50752NOX	ND
2017-01-09	BX17960NOX	ND
2017-01-12	BX20215NOX	ND
2017-04-03	BX97632NOX	ND
2017-07-13	BY58616NOX	ND
2017-10-09	BZ17737NOX	ND
2018-01-08	BZ69305NOX	ND
2018-04-03	CA12885NOX	ND
2018-07-11	CA87192NOX	ND
2018-10-01	CB61945	ND
2019-02-01	CC39646	ND
2019-04-01	CC78528	ND
2019-07-02	CD49289	ND
2019-10-14	CE40397	ND
2019-10-14	CE40398	ND