Nitrite

Arizona Water Company - Sedona

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	Range of results
2014	ND	8	ND
2015	ND	8	ND
2016	ND	8	ND
2017	ND	8	ND
2018	ND	5	ND
2019	N/A	0	N/A

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
2014-08-13	4081332-08	ND
2014-08-13	4081332-07	ND
2014-08-13	4081332-06	ND
2014-08-13	4081332-05	ND
2014-08-13	4081332-04	ND
2014-08-13	4081332-03	ND
2014-08-13	4081332-02	ND
2014-08-13	4081332-01	ND
2015-05-19	5051638-07I	ND
2015-05-19	5051638-01I	ND
2015-05-19	5051638-02I	ND
2015-05-19	5051638-03I	ND
2015-05-19	5051638-04I	ND
2015-05-19	5051638-05I	ND
2015-05-19	5051638-06I	ND
2015-06-17	5061654-01I	ND
2016-05-18	6051652-05	ND
2016-05-18	6051652-07	ND
2016-05-18	6051652-06	ND
2016-05-18	6051652-04	ND
2016-05-18	6051652-03	ND
2016-05-18	6051652-02	ND
2016-05-18	6051652-01	ND
2016-09-20	6091660-01I	ND
2017-05-10	7051288-04	ND
2017-05-10	7051288-01	ND
2017-05-10	7051288-02	ND
2017-05-10	7051288-03	ND
2017-05-10	7051288-05	ND
2017-05-10	7051288-06	ND
2017-05-10	7051288-07	ND
2017-05-16	7051692-01	ND
2018-05-09	18E1147-04 IOC	ND
2018-05-09	18E1147-08 IOC	ND
2018-05-09	18E1147-07 IOC	ND
2018-05-09	18E1147-06 IOC	ND
2018-05-09	18E1147-05 IOC	ND