Nitrite

Ridgewood Water

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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261

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	N/A	0	0	N/A
2015	ND	15	0	ND
2016	ND	57	0	ND
2017	0.223 ppm	64	19	ND - 0.900 ppm
2018	ND	68	0	ND
2019	0.000744 ppm	57	3	ND - 0.0209 ppm

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
2015-10-14	5100424-04	ND
2015-10-14	5100424-03	ND
2015-10-14	5100424-10	ND
2015-10-14	5100424-05	ND
2015-10-14	5100424-01	ND
2015-10-14	5100424-09	ND
2015-10-14	5100424-02	ND
2015-10-14	5100424-07	ND
2015-10-14	5100424-06	ND
2015-10-14	5100424-08	ND
2015-10-21	5100667-03	ND
2015-10-21	5100667-02	ND
2015-10-21	5100667-04	ND
2015-10-21	5100667-01	ND
2015-12-29	5120773-02	ND
2016-01-07	6010110-06	ND
2016-01-07	6010110-01	ND
2016-01-07	6010110-07	ND
2016-01-07	6010110-04	ND
2016-01-07	6010110-02	ND
2016-01-07	6010110-05	ND
2016-01-07	6010110-03	ND
2016-01-07	6010110-09	ND
2016-01-07	6010110-10	ND
2016-01-07	6010110-11	ND
2016-01-07	6010110-08	ND
2016-01-07	6010110-12	ND
2016-01-08	6010173-01	ND
2016-01-08	6010173-02	ND
2016-04-06	6040180-04	ND
2016-04-06	6040180-06	ND
2016-04-06	6040180-05	ND
2016-04-06	6040180-02	ND
2016-04-06	6040180-03	ND
2016-04-06	6040180-01	ND
2016-04-06	6040180-08	ND
2016-04-06	6040180-07	ND
2016-04-06	6040180-09	ND
2016-04-19	6040629-02	ND
2016-04-19	6040629-01	ND
2016-05-03	6050075-01	ND
2016-05-11	6050372-04	ND
2016-07-06	6070112-06	ND
2016-07-06	6070112-09	ND
2016-07-06	6070112-07	ND
2016-07-06	6070112-04	ND
2016-07-06	6070112-01	ND
2016-07-06	6070112-08	ND
2016-07-06	6070112-02	ND
2016-07-06	6070112-05	ND
2016-07-06	6070112-03	ND
2016-07-06	6070112-11	ND
2016-07-06	6070112-10	ND
2016-07-06	6070112-14	ND
2016-07-06	6070112-13	ND
2016-07-06	6070112-12	ND
2016-07-06	6070112-15	ND
2016-10-11	6100288-07	ND
2016-10-11	6100288-06	ND
2016-10-11	6100288-11	ND
2016-10-11	6100288-08	ND
2016-10-11	6100288-04	ND
2016-10-11	6100288-03	ND
2016-10-11	6100288-09	ND
2016-10-11	6100288-01	ND
2016-10-11	6100288-05	ND
2016-10-11	6100288-02	ND
2016-10-11	6100288-10	ND
2016-10-11	6100288-13	ND
2016-10-11	6100288-12	ND
2016-10-11	6100288-14	ND
2016-10-11	6100288-15	ND
2017-01-18	7010444-04	ND
2017-01-18	7010444-07	0.800 ppm
2017-01-18	7010444-05	ND
2017-01-18	7010444-03	ND
2017-01-18	7010444-02	ND
2017-01-18	7010444-06	0.800 ppm
2017-01-18	7010444-01	0.800 ppm
2017-01-18	7010444-10	ND
2017-01-18	7010444-11	0.800 ppm
2017-01-18	7010444-12	ND
2017-01-18	7010444-14	ND
2017-01-18	7010444-13	ND
2017-01-18	7010444-08	0.600 ppm
2017-01-18	7010444-09	ND
2017-01-18	7010444-15	ND
2017-01-18	7010444-16	ND
2017-01-24	7010573-01	ND
2017-04-18	7040506-04	0.700 ppm
2017-04-18	7040506-06	0.800 ppm
2017-04-18	7040506-05	0.900 ppm
2017-04-20	7040580-05	0.900 ppm
2017-04-20	7040580-01	0.900 ppm
2017-04-20	7040580-10	0.700 ppm
2017-04-20	7040580-03	0.900 ppm
2017-04-20	7040580-02	0.800 ppm
2017-04-20	7040580-04	0.600 ppm
2017-04-20	7040580-07	0.600 ppm
2017-04-20	7040580-08	0.800 ppm
2017-04-20	7040580-06	0.500 ppm
2017-04-20	7040580-09	0.600 ppm
2017-05-10	7050367-02	ND
2017-05-10	7050367-01	ND
2017-05-17	7050640-03	ND
2017-07-05	7070048-06	ND
2017-07-05	7070048-10	ND
2017-07-05	7070048-07	ND
2017-07-05	7070048-04	ND
2017-07-05	7070048-03	ND
2017-07-05	7070025-01	0.800 ppm
2017-07-05	7070048-08	ND
2017-07-05	7070048-01	ND
2017-07-05	7070048-05	ND
2017-07-05	7070048-02	ND
2017-07-05	7070048-09	ND
2017-07-05	7070048-12	ND
2017-07-05	7070048-11	ND
2017-07-05	7070048-15	ND
2017-07-05	7070048-14	ND
2017-07-05	7070048-13	ND
2017-10-03	7100035-07	ND
2017-10-03	7100035-06	ND
2017-10-03	7100035-08	ND
2017-10-03	7100035-12	ND
2017-10-03	7100035-09	ND
2017-10-03	7100035-04	ND
2017-10-03	7100035-03	ND
2017-10-03	7100035-10	ND
2017-10-03	7100035-01	ND
2017-10-03	7100035-05	ND
2017-10-03	7100035-02	ND
2017-10-03	7100035-11	ND
2017-10-03	7100035-14	ND
2017-10-03	7100035-13	ND
2017-10-03	7100035-15	ND
2018-01-03	8010030-05	ND
2018-01-03	8010030-04	ND
2018-01-03	8010030-03	ND
2018-01-03	8010030-02	ND
2018-01-03	8010030-01	ND
2018-01-03	8010030-06	ND
2018-01-03	8010030-07	ND
2018-01-03	8010030-08	ND
2018-01-09	8010168-03	ND
2018-01-09	8010168-04	ND
2018-01-09	8010168-01	ND
2018-01-09	8010168-02	ND
2018-01-09	8010168-05	ND
2018-01-09	8010168-06	ND
2018-01-19	8010486-03	ND
2018-01-19	8010486-04	ND
2018-01-19	8010486-01	ND
2018-01-19	8010486-02	ND
2018-01-19	8010486-05	ND
2018-01-19	8010486-06	ND
2018-02-05	8020087-03	ND
2018-04-03	8040027-06	ND
2018-04-03	8040027-01	ND
2018-04-03	8040027-07	ND
2018-04-03	8040027-04	ND
2018-04-03	8040027-03	ND
2018-04-03	8040027-08	ND
2018-04-03	8040027-05	ND
2018-04-03	8040027-02	ND
2018-04-03	8040027-09	ND
2018-04-03	8040027-11	ND
2018-04-03	8040027-10	ND
2018-04-04	8040074-03	ND
2018-04-04	8040074-05	ND
2018-04-26	8040945-02	ND
2018-04-26	8040945-01	ND
2018-07-02	8070013-07	ND
2018-07-02	8070013-11	ND
2018-07-02	8070013-08	ND
2018-07-02	8070013-05	ND
2018-07-02	8070013-04	ND
2018-07-02	8070013-01	ND
2018-07-02	8070013-09	ND
2018-07-02	8070013-02	ND
2018-07-02	8070013-06	ND
2018-07-02	8070013-03	ND
2018-07-02	8070013-10	ND
2018-07-02	8070013-13	ND
2018-07-02	8070013-14	ND
2018-07-02	8070013-12	ND
2018-07-02	8070013-16	ND
2018-07-02	8070013-15	ND
2018-10-02	8100082-08	ND
2018-10-02	8100082-07	ND
2018-10-02	8100082-09	ND
2018-10-02	8100082-01	ND
2018-10-02	8100082-05	ND
2018-10-02	8100082-04	ND
2018-10-02	8100082-02	ND
2018-10-02	8100082-06	ND
2018-10-02	8100082-03	ND
2018-10-03	8100136-01	ND
2018-10-03	8100136-02	ND
2018-10-03	8100136-03	ND
2018-10-03	8100136-05	ND
2018-10-03	8100136-06	ND
2018-10-03	8100136-04	ND
2018-10-03	8100136-07	ND
2019-01-10	9010342-02	ND
2019-01-10	9010342-06	ND
2019-01-10	9010342-03	ND
2019-01-10	9010342-01	ND
2019-01-10	9010342-09	ND
2019-01-10	9010342-04	ND
2019-01-10	9010342-08	ND
2019-01-10	9010342-05	ND
2019-01-10	9010342-15	ND
2019-01-10	9010342-14	ND
2019-01-10	9010342-13	ND
2019-01-10	9010342-11	ND
2019-01-10	9010342-12	ND
2019-01-10	9010342-07	ND
2019-01-10	9010342-16	ND
2019-01-10	9010342-10	ND
2019-04-10	9040481-02	ND
2019-04-10	9040481-06	ND
2019-04-10	9040481-12	ND
2019-04-10	9040481-07	ND
2019-04-10	9040481-11	ND
2019-04-10	9040481-10	ND
2019-04-10	9040481-09	ND
2019-04-10	9040481-01	ND
2019-04-10	9040481-03	0.0209 ppm
2019-04-10	9040481-08	ND
2019-04-10	9040481-05	0.0115 ppm
2019-04-10	9040481-04	ND
2019-07-24	9071191-08	ND
2019-07-24	9071191-14	ND
2019-07-24	9071191-02	ND
2019-07-24	9071191-01	ND
2019-07-24	9071191-05	ND
2019-07-24	9071191-09	ND
2019-07-24	9071191-11	ND
2019-07-24	9071191-07	ND
2019-07-24	9071191-06	ND
2019-07-24	9071191-10	ND
2019-07-24	9071191-03	ND
2019-07-24	9071191-13	ND
2019-07-24	9071191-12	ND
2019-07-24	9071191-04	ND
2019-09-19	9090882-01	0.01000 ppm
2019-10-09	9100466-06	ND
2019-10-09	9100466-07	ND
2019-10-09	9100466-13	ND
2019-10-09	9100466-03	ND
2019-10-09	9100466-01	ND
2019-10-09	9100466-11	ND
2019-10-09	9100466-09	ND
2019-10-09	9100466-05	ND
2019-10-09	9100466-08	ND
2019-10-09	9100466-04	ND
2019-10-09	9100466-12	ND
2019-10-09	9100466-10	ND
2019-10-09	9100466-02	ND
2019-12-04	9120094-01	ND