Nitrite

Aplington Water Supply

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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128

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	0.211 ppm	24	10	ND - 0.810 ppm
2015	0.390 ppm	24	20	ND - 0.900 ppm
2016	0.335 ppm	24	19	ND - 0.760 ppm
2017	0.0979 ppm	24	3	ND - 1.28 ppm
2018	0.00110 ppm	24	1	ND - 0.0265 ppm
2019	ND	8	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	2025250	0.670 ppm
2014-01-08	2025251	ND
2014-02-13	2032495	0.810 ppm
2014-02-13	2032496	ND
2014-03-04	2035766	0.750 ppm
2014-03-04	2035767	ND
2014-04-10	2043047	0.570 ppm
2014-04-10	2043048	ND
2014-05-07	2047976	0.200 ppm
2014-05-07	2047977	ND
2014-06-10	2054628	ND
2014-06-11	2054627	0.540 ppm
2014-07-02	2059452	0.730 ppm
2014-07-02	2059453	ND
2014-08-13	2068201	ND
2014-08-13	2068202	ND
2014-09-03	2073460	0.150 ppm
2014-09-03	2073461	ND
2014-10-01	2080441	0.460 ppm
2014-10-01	2080442	ND
2014-11-04	2088339	ND
2014-11-05	2088338	ND
2014-12-03	2095091	0.180 ppm
2014-12-03	2095092	ND
2015-01-07	2A50078-03	0.900 ppm
2015-01-07	2A50078-04	ND
2015-02-05	2B50105-04	0.430 ppm
2015-02-05	2B50105-05	0.350 ppm
2015-03-04	2C50108-04	0.310 ppm
2015-03-04	2C50108-03	0.570 ppm
2015-04-01	2D50015-03	0.320 ppm
2015-04-01	2D50015-04	0.340 ppm
2015-05-06	1E50452-01	0.610 ppm
2015-05-06	1E50452-02	0.500 ppm
2015-06-03	2F50119-03	0.780 ppm
2015-06-03	2F50119-04	0.260 ppm
2015-07-01	2G50028-03	0.580 ppm
2015-07-01	2G50028-04	ND
2015-08-05	2H50144-03	ND
2015-08-05	2H50144-04	ND
2015-09-02	2I50100-04	0.330 ppm
2015-09-02	2I50100-03	0.380 ppm
2015-10-07	2J50181-03	0.680 ppm
2015-10-07	2J50181-04	0.410 ppm
2015-11-05	2K50178-04	0.270 ppm
2015-11-05	2K50178-03	0.290 ppm
2015-12-02	2L50080-03	0.720 ppm
2015-12-02	2L50080-04	0.340 ppm
2016-01-13	2A60290-05	0.150 ppm
2016-01-13	2A60290-04	0.670 ppm
2016-02-04	2B60123-04	0.440 ppm
2016-02-04	2B60123-03	0.200 ppm
2016-03-02	2C60065-03	0.680 ppm
2016-03-02	2C60065-04	0.120 ppm
2016-04-06	2D60162-03	0.180 ppm
2016-04-06	2D60162-04	0.300 ppm
2016-05-05	2E60200-04	0.550 ppm
2016-05-05	2E60200-03	0.380 ppm
2016-06-01	2F60032-03	ND
2016-06-01	2F60032-04	ND
2016-07-13	2G60371-03	0.480 ppm
2016-07-13	2G60371-04	0.760 ppm
2016-08-03	2H60129-04	0.490 ppm
2016-08-03	2H60129-03	0.710 ppm
2016-09-01	2I60033-04	0.430 ppm
2016-09-01	2I60033-03	0.690 ppm
2016-10-05	2J60194-04	ND
2016-10-05	2J60194-03	0.190 ppm
2016-11-02	2K60127-03	ND
2016-11-02	2K60127-04	ND
2016-12-07	2L60166-03	0.270 ppm
2016-12-07	2L60166-04	0.340 ppm
2017-01-05	2A70118-03	0.770 ppm
2017-01-05	2A70118-04	1.28 ppm
2017-02-02	2B70077-02	0.300 ppm
2017-02-02	2B70077-03	ND
2017-03-08	2C70208-02	ND
2017-03-08	2C70208-03	ND
2017-04-06	2D70224-05	ND
2017-04-06	2D70224-04	ND
2017-05-03	2E70157-04	ND
2017-05-03	2E70157-05	ND
2017-06-07	2F70188-03	ND
2017-06-07	2F70188-04	ND
2017-07-12	2G70287-05	ND
2017-07-12	2G70287-04	ND
2017-08-02	2H70099-04	ND
2017-08-02	2H70099-03	ND
2017-09-13	2I70326-05	ND
2017-09-13	2I70326-04	ND
2017-10-04	2J70191-04	ND
2017-10-04	2J70191-05	ND
2017-11-09	2K70281-05	ND
2017-11-09	2K70281-04	ND
2017-12-07	2L70212-05	ND
2017-12-07	2L70212-04	ND
2018-01-03	2A80054-04	ND
2018-01-03	2A80054-05	ND
2018-02-07	2B80116-04	0.0265 ppm
2018-02-07	2B80116-05	ND
2018-03-07	2C80132-03	ND
2018-03-07	2C80132-04	ND
2018-04-11	2D80351-04	ND
2018-04-11	2D80351-05	ND
2018-05-02	2E80090-03	ND
2018-05-02	2E80090-04	ND
2018-06-06	2F80163-03	ND
2018-06-06	2F80163-04	ND
2018-07-11	2G80262-04	ND
2018-07-11	2G80262-05	ND
2018-08-01	2H80029-03	ND
2018-08-01	2H80029-04	ND
2018-09-05	2I80091-03	ND
2018-09-05	2I80091-04	ND
2018-10-10	2J80374-03	ND
2018-10-10	2J80374-04	ND
2018-11-08	2K80201-03	ND
2018-11-08	2K80201-04	ND
2018-12-05	2L80117-03	ND
2018-12-05	2L80117-04	ND
2019-01-03	2A90080-03	ND
2019-01-03	2A90080-04	ND
2019-04-02	2D90162-03	ND
2019-04-03	2D90162-04	ND
2019-07-08	2G90115-03	ND
2019-07-08	2G90115-04	ND
2019-10-01	2J90021-03	ND
2019-10-01	2J90021-04	ND