Nitrate

Aqua Ohio - Marion

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

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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	1.23 ppm	13	11	ND - 3.42 ppm
2015	1.55 ppm	12	11	ND - 4.04 ppm
2016	1.88 ppm	12	10	ND - 4.80 ppm
2017	3.36 ppm	12	11	ND - 6.89 ppm
2018	2.62 ppm	12	12	0.230 ppm - 4.87 ppm
2019	2.00 ppm	10	10	0.280 ppm - 4.10 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date	Lab ID	Result
2014-01-09	14-10298-04	1.69 ppm
2014-02-11	14-11593-03	1.10 ppm
2014-03-11	14-12824-03	1.29 ppm
2014-04-08	14-14176-03	2.60 ppm
2014-05-13	14-15755-03	1.34 ppm
2014-06-04	14-16894-01	1.69 ppm
2014-07-07	14-18711-01	3.42 ppm
2014-07-23	14-19633-03	ND
2014-08-12	14-20636-03	0.420 ppm
2014-09-10	14-22308-01	0.190 ppm
2014-10-07	14-23766-01A	ND
2014-11-11	14-25425-03	0.200 ppm
2014-12-03	14-26325-01	2.09 ppm
2015-01-06	15-10059-01A	2.04 ppm
2015-02-04	15-11266-01	1.34 ppm
2015-03-04	15-12454-02	0.400 ppm
2015-04-07	15-14166-02A	2.67 ppm
2015-05-06	15-15603-01A	0.990 ppm
2015-06-01	15-16990-01	1.13 ppm
2015-07-06	15-19061-01A	2.69 ppm
2015-08-05	15-20850-02	0.300 ppm
2015-09-02	15-22644-02	ND
2015-10-01	15-24281-01A	0.260 ppm
2015-11-04	15-26178-02	2.74 ppm
2015-12-03	15-27574-02	4.04 ppm
2016-01-06	16-10196-02	4.80 ppm
2016-02-02	16-11377-02	2.97 ppm
2016-03-03	16-13013-02	1.87 ppm
2016-04-04	16-14667-03A	4.51 ppm
2016-05-03	16-16154-02A	2.65 ppm
2016-06-09	16-18468-02	1.18 ppm
2016-07-05	16-19987-02	2.78 ppm
2016-08-08	16-22539-01	ND
2016-09-12	16-24983-01	ND
2016-10-11	16-27090-02	0.910 ppm
2016-11-07	16-28756-02	0.610 ppm
2016-12-06	16-30262-01	0.300 ppm
2017-01-05	17-10250-03	6.38 ppm
2017-02-01	17-11699-02	4.85 ppm
2017-03-02	17-13604-01	3.65 ppm
2017-04-03	17-15446-01	6.89 ppm
2017-05-01	17-17334-01	6.48 ppm
2017-06-06	17-19695-04	3.97 ppm
2017-07-11	17-22447-01	2.70 ppm
2017-08-01	17-24062-02	1.35 ppm
2017-09-12	17-27363-02	0.480 ppm
2017-10-03	17-28912-01	ND
2017-11-01	17-31046-01	0.270 ppm
2017-12-04	17-32998-01	3.29 ppm
2018-01-03	18-10122-01	2.51 ppm
2018-02-01	18-11842-02	4.87 ppm
2018-03-07	18-13940-02	2.93 ppm
2018-04-03	18-15827-01A	2.81 ppm
2018-05-01	18-17837-01	2.82 ppm
2018-06-05	18-20571-01	4.71 ppm
2018-07-10	18-23866-01	1.22 ppm
2018-08-01	18-25827-01	0.790 ppm
2018-09-10	18-29421-01	0.230 ppm
2018-10-03	18-31519-01	1.37 ppm
2018-11-01	18-33833-01	3.78 ppm
2018-12-05	18-36209-01	3.40 ppm
2019-01-08	19-10462-02	3.57 ppm
2019-02-05	19-12217-02	1.95 ppm
2019-03-05	19-14141-01	2.66 ppm
2019-04-01	19-16235-01A	1.20 ppm
2019-05-01	19-18474-01	4.10 ppm
2019-06-04	19-21016-01	2.11 ppm
2019-07-08	19-24260-01	1.03 ppm
2019-08-01	M19-26390-01	1.27 ppm
2019-09-10	19-29973-02	1.78 ppm
2019-10-01	19-31876-03	0.280 ppm