Nitrate and nitrite
Ironton PWS
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.
68
Samples
0
Samples exceeding legal limit (MCL)
68
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.909 ppm | 11 | 11 | 0.500 ppm - 1.70 ppm |
| 2015 | 0.716 ppm | 11 | 11 | 0.420 ppm - 1.40 ppm |
| 2016 | 0.771 ppm | 12 | 12 | 0.500 ppm - 1.30 ppm |
| 2017 | 0.818 ppm | 12 | 12 | 0.560 ppm - 1.14 ppm |
| 2018 | 0.804 ppm | 12 | 12 | 0.600 ppm - 0.980 ppm |
| 2019 | 0.909 ppm | 10 | 10 | 0.670 ppm - 1.14 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 |
|---|---|---|
| 2014-02-12 | A140136432 | 1.22 ppm |
| 2014-03-12 | A140182858 | 0.500 ppm |
| 2014-04-09 | A140194165 | 0.710 ppm |
| 2014-05-14 | A140201630 | 1.10 ppm |
| 2014-06-11 | A140170237 | 1.30 ppm |
| 2014-07-09 | A140201631 | 1.70 ppm |
| 2014-08-13 | A140218618 | 0.720 ppm |
| 2014-09-10 | A140218619 | 0.720 ppm |
| 2014-10-15 | A140224163 | 0.550 ppm |
| 2014-11-12 | A140207053 | 0.800 ppm |
| 2014-12-10 | A140243008 | 0.680 ppm |
| 2015-01-14 | A150262784 | 0.600 ppm |
| 2015-02-11 | A150262785 | 0.740 ppm |
| 2015-03-11 | A150249076 | 0.680 ppm |
| 2015-04-08 | A150112328 | 0.630 ppm |
| 2015-05-13 | A150288261 | 0.420 ppm |
| 2015-06-10 | A150288264 | 0.610 ppm |
| 2015-07-08 | A150288128 | 1.08 ppm |
| 2015-08-12 | A150309238 | 0.640 ppm |
| 2015-09-09 | A150309241 | 0.460 ppm |
| 2015-10-14 | A150334662 | 0.620 ppm |
| 2015-12-09 | A150345043 | 1.40 ppm |
| 2016-01-13 | A160353724 | 1.30 ppm |
| 2016-02-10 | A160357805 | 0.790 ppm |
| 2016-03-09 | A160361168 | 0.720 ppm |
| 2016-04-06 | A160376935 | 0.780 ppm |
| 2016-05-11 | A160343045 | 0.540 ppm |
| 2016-06-08 | A160343044 | 0.600 ppm |
| 2016-07-13 | A160403505 | 0.820 ppm |
| 2016-08-10 | A160418768 | 0.760 ppm |
| 2016-09-14 | A160403579 | 0.500 ppm |
| 2016-10-12 | A160343046 | 0.700 ppm |
| 2016-11-09 | A160448345 | 0.960 ppm |
| 2016-12-14 | A160345046 | 0.780 ppm |
| 2017-01-11 | A170444670 | 1.14 ppm |
| 2017-02-08 | A170460641 | 1.04 ppm |
| 2017-03-08 | A170469764 | 0.710 ppm |
| 2017-04-12 | A170480366 | 0.700 ppm |
| 2017-05-10 | A170487101 | 0.600 ppm |
| 2017-06-14 | A170497401 | 0.560 ppm |
| 2017-07-12 | A170493058 | 0.750 ppm |
| 2017-08-09 | A170460640 | 0.760 ppm |
| 2017-09-13 | A170533503 | 0.730 ppm |
| 2017-10-11 | A170515572 | 0.750 ppm |
| 2017-11-08 | A170545055 | 1.07 ppm |
| 2017-12-13 | A170534494 | 1.000 ppm |
| 2018-01-10 | A180547546 | 0.960 ppm |
| 2018-02-07 | A180547548 | 0.980 ppm |
| 2018-03-14 | A180533690 | 0.940 ppm |
| 2018-04-11 | A180533697 | 0.850 ppm |
| 2018-05-16 | A180533502 | 0.600 ppm |
| 2018-06-06 | A180547924 | 0.750 ppm |
| 2018-07-11 | A180619918 | 0.920 ppm |
| 2018-08-08 | A180533559 | 0.600 ppm |
| 2018-09-05 | A180584974 | 0.650 ppm |
| 2018-10-03 | A180642831 | 0.800 ppm |
| 2018-11-14 | 8K01692-01 | 0.770 ppm |
| 2018-12-05 | 8L00461-01 | 0.830 ppm |
| 2019-01-09 | 9A01228-01 | 0.820 ppm |
| 2019-02-06 | 9B00483-01 | 0.920 ppm |
| 2019-03-13 | 9C01600-02 | 0.950 ppm |
| 2019-04-03 | 9D00402-01 | 0.830 ppm |
| 2019-05-01 | 9E00073-01 | 0.670 ppm |
| 2019-06-05 | 9F00423-01 | 0.860 ppm |
| 2019-07-03 | 9G00416-02 | 1.01 ppm |
| 2019-08-07 | 9H00871-01 | 0.930 ppm |
| 2019-09-11 | 9I01554-02 | 1.14 ppm |
| 2019-10-02 | 9J00249-02 | 0.960 ppm |