Nitrate and nitrite

Epcor Water - Agua Fria

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

162

Samples

Samples exceeding legal limit (MCL)

105

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	1.21 ppm	29	19	ND - 5.23 ppm
2015	0.408 ppm	27	16	ND - 3.12 ppm
2016	0.459 ppm	23	19	ND - 3.23 ppm
2017	0.551 ppm	22	14	ND - 4.00 ppm
2018	0.866 ppm	29	25	ND - 3.45 ppm
2019	0.785 ppm	32	21	ND - 4.01 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date	Lab ID	Result
2014-02-20	4021662-01I	1.50 ppm
2014-02-20	4021662-02I	2.77 ppm
2014-02-21	4021720-01I	3.48 ppm
2014-02-21	4021720-02	3.43 ppm
2014-03-17	4031321-01I	2.80 ppm
2014-03-18	4031423-01I	5.23 ppm
2014-03-18	4031423-02I	1.04 ppm
2014-03-18	4031423-03I	1.46 ppm
2014-03-19	4031531-01	0.310 ppm
2014-05-07	4050637-01	4.42 ppm
2014-05-07	4050637-02	1.09 ppm
2014-05-07	4050637-03	1.30 ppm
2014-05-07	4050637-04	0.220 ppm
2014-05-08	4050765-01	0.330 ppm
2014-05-08	4050765-02	0.270 ppm
2014-05-08	4050765-03	0.250 ppm
2014-06-16	4061297-01	ND
2014-06-24	4061967-01I	0.330 ppm
2014-08-01	4080053-01	4.66 ppm
2014-08-05	4080428-04	ND
2014-08-06	4080551-01I	ND
2014-08-06	4080551-02	ND
2014-09-29	4092331-01	ND
2014-09-29	4092331-02	ND
2014-11-17	4111350-04	ND
2014-11-17	4111350-05	ND
2014-11-18	4111490-01	ND
2014-11-18	4111490-02	ND
2014-11-18	4111490-03	0.220 ppm
2015-02-26	5022333-03	0.230 ppm
2015-02-26	5022333-04	1.72 ppm
2015-02-26	5022333-05	1.02 ppm
2015-03-05	5030509-01	0.350 ppm
2015-03-05	5030509-02	0.260 ppm
2015-03-05	5030509-03	0.250 ppm
2015-04-27	5042326-01	3.12 ppm
2015-04-27	5042326-02	0.980 ppm
2015-05-12	5051006-01	1.45 ppm
2015-05-12	5051006-02	ND
2015-05-12	5051006-03	ND
2015-05-12	5051006-04	ND
2015-05-12	5051006-05	ND
2015-05-12	5051006-06	0.210 ppm
2015-05-12	5051006-07	ND
2015-08-03	5080125-02I	ND
2015-08-03	5080125-03I	ND
2015-08-03	5080125-04	ND
2015-08-03	5080125-05	ND
2015-08-04	5080273-03I	ND
2015-08-04	5080273-04	ND
2015-11-30	5112306-04	0.220 ppm
2015-11-30	5112306-05	0.220 ppm
2015-11-30	5112306-06	0.220 ppm
2015-12-03	5120407-01	0.230 ppm
2015-12-03	5120407-02I	0.300 ppm
2015-12-03	5120407-03	0.230 ppm
2016-03-22	6031906-01	0.570 ppm
2016-03-22	6031906-02	0.340 ppm
2016-03-23	6032047-01I	0.360 ppm
2016-03-23	6032047-02	0.360 ppm
2016-03-23	6032047-03	0.360 ppm
2016-03-23	6032047-04	0.360 ppm
2016-06-01	6060112-01	3.23 ppm
2016-06-01	6060112-02	1.44 ppm
2016-06-01	6060112-03	1.25 ppm
2016-06-01	6060112-04	0.230 ppm
2016-06-06	6060444-01	0.210 ppm
2016-06-06	6060444-03	0.220 ppm
2016-06-06	6060444-04	0.210 ppm
2016-09-16	6091438-01	ND
2016-09-16	6091438-02	ND
2016-09-16	6091438-03	ND
2016-09-16	6091438-04	ND
2016-12-01	6120081-01	0.320 ppm
2016-12-01	6120081-02I	0.220 ppm
2016-12-01	6120081-03	0.200 ppm
2016-12-01	6120081-04	0.220 ppm
2016-12-02	6120164-04	0.230 ppm
2016-12-02	6120164-05	0.230 ppm
2017-03-16	7031480-02	0.250 ppm
2017-03-20	7031693-01	0.240 ppm
2017-03-20	7031693-02	0.240 ppm
2017-03-21	7031806-01	0.230 ppm
2017-03-21	7031806-02	0.240 ppm
2017-03-22	7031982-01	0.220 ppm
2017-05-18	7051941-01	3.19 ppm
2017-05-18	7051941-02	0.220 ppm
2017-05-18	7051941-03	1.25 ppm
2017-05-30	7052780-01	0.200 ppm
2017-05-31	7052920-01	1.42 ppm
2017-05-31	7052920-02	ND
2017-06-06	7060554-03	ND
2017-08-09	7081006-01	ND
2017-08-09	7081006-02	ND
2017-08-10	7081172-01	ND
2017-12-05	7120469-01	ND
2017-12-05	7120469-02	0.200 ppm
2017-12-05	7120469-03IOC	ND
2017-12-05	7120469-04	ND
2017-12-06	7120629-01	0.218 ppm
2017-12-13	7121345-04	4.00 ppm
2018-03-05	18C0358-01 IOC	3.15 ppm
2018-03-05	18C0358-02 IOC	1.25 ppm
2018-03-05	18C0358-03 IOC	ND
2018-03-06	18C0528-01 IOC	ND
2018-03-06	18C0528-02 IOC	ND
2018-03-20	18C1975-02 IOC	ND
2018-03-23	18C2301-01 IOC	1.35 ppm
2018-05-29	18E2804-01	3.45 ppm
2018-05-29	18E2804-02	1.53 ppm
2018-05-29	18E2804-03	1.33 ppm
2018-05-30	18E2948-01 IOC	0.250 ppm
2018-05-30	18E2948-02 IOC	0.240 ppm
2018-05-30	18E2948-03 IOC	0.240 ppm
2018-06-07	18F0816-02	0.240 ppm
2018-06-11	18F1098-01	0.180 ppm
2018-08-16	18H1816-01	3.41 ppm
2018-08-16	18H1816-02 IOC	1.26 ppm
2018-08-16	18H1816-04 IOC	0.0900 ppm
2018-08-21	18H2278-01 IOC	0.150 ppm
2018-08-21	18H2278-02	0.150 ppm
2018-08-21	18H2278-03 IOC	0.150 ppm
2018-08-21	18H2278-04	0.220 ppm
2018-08-23	18H2522-01 IOC	0.140 ppm
2018-11-13	18K1266-01	2.96 ppm
2018-11-13	18K1266-02	1.34 ppm
2018-11-13	18K1266-03	1.34 ppm
2018-11-15	18K1636-01	0.240 ppm
2018-11-15	18K1636-02	0.220 ppm
2018-11-15	18K1636-03	0.220 ppm
2019-03-13	19C1415-01	2.91 ppm
2019-03-13	19C1415-02	1.25 ppm
2019-03-13	19C1415-03	1.40 ppm
2019-03-13	19C1415-04	0.230 ppm
2019-03-21	19C2341-01	0.310 ppm
2019-05-21	19E2359-01	0.110 ppm
2019-05-21	19E2359-02	0.110 ppm
2019-05-21	19E2359-03	0.110 ppm
2019-05-22	19E2454-01	0.130 ppm
2019-05-22	19E2454-02	0.120 ppm
2019-05-22	19E2454-03	0.120 ppm
2019-05-24	19E2721-01	3.04 ppm
2019-05-24	19E2721-02	1.11 ppm
2019-05-24	19E2721-03	1.23 ppm
2019-08-28	19H3278-01	ND
2019-08-28	19H3278-02	ND
2019-08-28	19H3278-03	ND
2019-08-28	19H3278-04	ND
2019-08-29	19H3407-01	ND
2019-08-29	19H3407-02	ND
2019-09-10	1911144-01	3.56 ppm
2019-09-10	1911144-02	1.38 ppm
2019-09-10	1911144-03	1.25 ppm
2019-10-09	19J1358-01	ND
2019-10-09	19J1358-02	ND
2019-10-10	19J1493-01	ND
2019-10-10	19J1493-02	ND
2019-10-14	19J1715-01	ND
2019-10-14	19J1715-02	0.1000 ppm
2019-10-31	19J3587-01	4.01 ppm
2019-10-31	19J3587-02	1.36 ppm
2019-10-31	19J3587-03	1.27 ppm