Nitrate and nitrite

Golden State Water Company - West Orange

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

123

Samples

Samples exceeding legal limit (MCL)

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	2.89 ppm	23	20	ND - 5.58 ppm
2015	3.04 ppm	24	20	ND - 5.90 ppm
2016	2.94 ppm	18	14	ND - 5.73 ppm
2017	2.74 ppm	16	13	ND - 5.28 ppm
2018	2.32 ppm	27	21	ND - 5.27 ppm
2019	2.48 ppm	15	11	ND - 4.96 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
2014-02-03	4417-055-0820	0.500 ppm
2014-02-11	4417-017-1135	3.04 ppm
2014-02-13	4417-019-0815	5.58 ppm
2014-02-13	4417-029-0840	0.600 ppm
2014-03-04	4417-025-0925	4.18 ppm
2014-03-19	4417-007-1040	ND
2014-03-19	4417-010-1105	ND
2014-03-19	4417-014-0830	ND
2014-03-19	4417-016-0845	1.53 ppm
2014-04-07	2706-017-1020	2.90 ppm
2014-04-07	2706-018-1055	4.10 ppm
2014-04-07	2706-019-0835	5.10 ppm
2014-04-07	2706-023-0925	1.70 ppm
2014-04-07	2706-024-1115	3.50 ppm
2014-04-07	2706-025-0855	5.20 ppm
2014-04-07	2706-029-0900	0.580 ppm
2014-05-21	4417-019-0950	5.53 ppm
2014-05-21	4417-023-1010	1.80 ppm
2014-05-21	4417-024-0820	4.12 ppm
2014-07-30	4417-021-1100	2.21 ppm
2014-08-12	4417-018-0755	3.48 ppm
2014-08-12	4417-019-1125	5.42 ppm
2014-11-04	4417-019-0905	5.46 ppm
2015-02-03	4417-010-1035	ND
2015-02-03	4417-014-1345	ND
2015-02-03	4417-016-1315	1.37 ppm
2015-02-03	4417-018-1130	3.42 ppm
2015-02-03	4417-019-1200	5.24 ppm
2015-02-04	4417-021-0925	2.20 ppm
2015-02-04	4417-023-1110	1.71 ppm
2015-02-04	4417-024-0900	4.05 ppm
2015-02-04	4417-025-0955	5.48 ppm
2015-02-04	4417-029-1010	0.620 ppm
2015-02-05	4417-055-1040	0.580 ppm
2015-02-12	4417-007-1010	ND
2015-02-12	4417-017-1115	2.90 ppm
2015-05-12	4417-018-1205	3.51 ppm
2015-05-12	4417-019-1145	5.40 ppm
2015-05-12	4417-023-0945	1.80 ppm
2015-05-12	4417-025-1005	5.60 ppm
2015-05-27	4417-021-0900	2.32 ppm
2015-08-05	4417-018-1025	3.72 ppm
2015-08-05	4417-019-1350	5.68 ppm
2015-08-05	4417-025-1220	5.90 ppm
2015-09-09	4417-010-0820	ND
2015-11-09	4417-019-0950	5.62 ppm
2015-11-09	4417-025-0920	5.88 ppm
2016-02-09	4417-010-0955	ND
2016-02-09	4417-016-0845	1.50 ppm
2016-02-17	4417-017-0910	2.78 ppm
2016-02-17	4417-019-1045	5.43 ppm
2016-02-17	4417-024-0940	4.35 ppm
2016-02-17	4417-025-1005	5.73 ppm
2016-02-17	4417-029-1025	0.670 ppm
2016-03-17	4417-007-0830	ND
2016-04-19	4417-014-1115	ND
2016-05-16	4417-018-0825	3.55 ppm
2016-05-16	4417-019-1000	5.34 ppm
2016-05-16	4417-023-0935	1.79 ppm
2016-05-16	4417-024-0845	4.44 ppm
2016-05-16	4417-024-0900	4.45 ppm
2016-06-14	4417-021-1220	2.19 ppm
2016-07-13	4417-010-0850	ND
2016-08-01	4417-019-0945	5.38 ppm
2016-11-03	4417-019-1005	5.31 ppm
2017-02-08	4417-017-0840	2.65 ppm
2017-02-08	4417-018-0815	3.48 ppm
2017-02-08	4417-019-0950	5.06 ppm
2017-02-08	4417-024-0910	4.00 ppm
2017-02-08	4417-029-0930	0.710 ppm
2017-02-13	4417-010-0820	ND
2017-02-13	4417-014-1100	ND
2017-02-13	4417-016-0905	1.42 ppm
2017-02-23	4417-018-0800	3.56 ppm
2017-03-20	4417-007-0850	ND
2017-05-10	4417-018-1130	3.54 ppm
2017-05-10	4417-019-0940	5.15 ppm
2017-05-10	4417-021-1150	1.94 ppm
2017-05-10	4417-023-0910	1.85 ppm
2017-08-08	4417-019-0910	5.28 ppm
2017-11-07	4417-019-1030	5.25 ppm
2018-02-12	4417-007-0825	ND
2018-02-12	4417-010-0805	ND
2018-02-12	4417-014-0915	ND
2018-02-12	4417-016-0940	1.36 ppm
2018-02-12	4417-017-1150	3.17 ppm
2018-02-12	4417-019-1005	5.17 ppm
2018-02-12	4417-021-1055	2.13 ppm
2018-02-12	4417-024-1115	4.68 ppm
2018-02-12	4417-029-1030	0.830 ppm
2018-05-10	4417-017-1420	2.94 ppm
2018-05-10	4417-017-1425	3.00 ppm
2018-05-10	4417-019-1305	5.23 ppm
2018-05-10	4417-021-1330	2.21 ppm
2018-05-10	4417-024-1350	4.15 ppm
2018-05-10	4417-024-1400	4.16 ppm
2018-05-10	4417-029-1255	0.840 ppm
2018-05-10	4417-029-1300	0.840 ppm
2018-05-21	4417-010-0810	ND
2018-05-21	4417-014-1015	ND
2018-05-21	4417-014-1020	ND
2018-05-21	4417-016-0950	1.33 ppm
2018-05-21	4417-016-1000	1.32 ppm
2018-05-21	4417-018-1035	3.72 ppm
2018-06-06	4417-023-0955	2.67 ppm
2018-07-26	4417-019-0910	5.27 ppm
2018-07-26	4417-023-0950	2.58 ppm
2018-10-09	4417-019-1005	5.03 ppm
2019-02-14	4417-010-1055	ND
2019-02-14	4417-018-0940	3.50 ppm
2019-02-14	4417-019-1000	4.80 ppm
2019-02-14	4417-023-1025	2.25 ppm
2019-02-14	4417-024-0920	4.38 ppm
2019-03-04	4417-016-0920	1.47 ppm
2019-03-07	4417-014-1110	ND
2019-03-18	4417-029-0910	0.870 ppm
2019-04-30	4417-017-0835	2.97 ppm
2019-04-30	4417-019-1010	4.93 ppm
2019-04-30	4417-021-0915	2.21 ppm
2019-05-06	4417-007-0825	ND
2019-07-09	4417-010-0730	ND
2019-07-24	4417-019-1005	4.90 ppm
2019-10-21	4417-019-1030	4.96 ppm