Nitrite

City of Clinton

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	5	ND
2015	ND	5	ND
2016	ND	5	ND
2017	ND	5	ND
2018	ND	5	ND
2019	ND	5	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
2014-03-05	37729_14-06449	ND
2014-03-05	37729_14-06450	ND
2014-03-05	37729_14-06451	ND
2014-03-05	37729_14-06452	ND
2014-03-06	37729_14-06448	ND
2015-03-16		ND
2015-03-16		ND
2015-03-16		ND
2015-03-16		ND
2015-03-16		ND
2016-05-11	37729_16-14931	ND
2016-05-11	37729_16-14933	ND
2016-05-11	37729_16-14934	ND
2016-05-11	37729_16-14935	ND
2016-05-11	37729_16-14936	ND
2017-05-16	37729_17-16186	ND
2017-05-16	37729_17-16190	ND
2017-05-16	37729_17-16189	ND
2017-05-16	37729_17-16188	ND
2017-05-16	37729_17-16187	ND
2018-04-27	37729_18-16563	ND
2018-04-27	37729_18-16564	ND
2018-04-27	37729_18-16565	ND
2018-04-27	37729_18-16566	ND
2018-04-27	37729_18-16567	ND
2019-04-17	37729_19-15755	ND
2019-04-17	37729_19-15756	ND
2019-04-17	37729_19-15757	ND
2019-04-17	37729_19-15758	ND
2019-04-17	37729_19-15759	ND