Nitrate and nitrite
Parsippany-Troy Hills Water Department
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 | 1.02 ppm | 12 | 12 | 0.744 ppm - 1.73 ppm |
| 2015 | 1.04 ppm | 12 | 12 | 0.749 ppm - 1.72 ppm |
| 2016 | 1.03 ppm | 11 | 11 | 0.695 ppm - 1.73 ppm |
| 2017 | 0.981 ppm | 11 | 11 | 0.681 ppm - 1.67 ppm |
| 2018 | 0.938 ppm | 11 | 11 | 0.464 ppm - 1.65 ppm |
| 2019 | 0.980 ppm | 11 | 11 | 0.768 ppm - 1.62 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 |
|---|---|---|
| 2014-09-17 | 340919069.1 | 0.799 ppm |
| 2014-09-17 | 340919079.1 | 1.04 ppm |
| 2014-09-17 | 340919080.1 | 0.780 ppm |
| 2014-09-17 | 340919073.1 | 1.73 ppm |
| 2014-09-17 | 340919072.1 | 0.804 ppm |
| 2014-09-17 | 340919071.1 | 0.995 ppm |
| 2014-09-17 | 340919070.1 | 1.42 ppm |
| 2014-09-17 | 340919078.1 | 1.07 ppm |
| 2014-09-17 | 340919077.1 | 0.744 ppm |
| 2014-09-17 | 340919076.1 | 0.788 ppm |
| 2014-09-17 | 340919075.1 | 1.000 ppm |
| 2014-09-17 | 340919074.1 | 1.02 ppm |
| 2015-09-16 | 350918113 | 0.995 ppm |
| 2015-09-16 | 350918120.2 | 1.72 ppm |
| 2015-09-16 | 350918123.2 | 0.859 ppm |
| 2015-09-16 | 350918117.2 | 1.28 ppm |
| 2015-09-16 | 350918112.2 | 1.02 ppm |
| 2015-09-16 | 350918119.2 | 0.996 ppm |
| 2015-09-16 | 350918116 | 1.22 ppm |
| 2015-09-16 | 350918122.2 | 0.802 ppm |
| 2015-09-16 | 350918121.2 | 0.998 ppm |
| 2015-09-16 | 350918118.2 | 1.01 ppm |
| 2015-09-16 | 350918114.2 | 0.780 ppm |
| 2015-12-08 | 351214064 | 0.749 ppm |
| 2016-09-06 | 360908064 | 0.970 ppm |
| 2016-09-06 | 360908056.2 | 1.26 ppm |
| 2016-09-06 | 360908059.2 | 1.73 ppm |
| 2016-09-06 | 360908058.2 | 0.777 ppm |
| 2016-09-06 | 360908063.2 | 1.07 ppm |
| 2016-09-06 | 360908065.2 | 0.737 ppm |
| 2016-09-06 | 360908067 | 1.21 ppm |
| 2016-09-06 | 360908061.2 | 0.804 ppm |
| 2016-09-06 | 360908060.2 | 1.03 ppm |
| 2016-09-06 | 360908057.2 | 1.03 ppm |
| 2016-12-06 | 361207097 | 0.695 ppm |
| 2017-09-13 | 370915027.3 | 1.05 ppm |
| 2017-09-13 | 370915028.3 | 0.784 ppm |
| 2017-09-13 | 370915026.3 | 1.17 ppm |
| 2017-09-13 | 370915029.3 | 1.67 ppm |
| 2017-09-13 | 370915025.3 | 0.823 ppm |
| 2017-09-13 | 370915030.3 | 0.802 ppm |
| 2017-09-13 | 370915024.3 | 1.21 ppm |
| 2017-09-13 | 370915021.3 | 0.865 ppm |
| 2017-09-13 | 370915020.3 | 1.05 ppm |
| 2017-09-13 | 370915022.3 | 0.689 ppm |
| 2017-12-06 | 371207188 | 0.681 ppm |
| 2018-09-04 | 380907188 | 1.65 ppm |
| 2018-09-04 | 380907189 | 0.841 ppm |
| 2018-09-04 | 380907190 | 1.000 ppm |
| 2018-09-04 | 380907194 | 0.836 ppm |
| 2018-09-04 | 380907191 | 0.751 ppm |
| 2018-09-04 | 380907193 | 1.14 ppm |
| 2018-09-05 | 380907187 | 0.772 ppm |
| 2018-09-05 | 380907186 | 0.988 ppm |
| 2018-09-05 | 380907192 | 0.705 ppm |
| 2018-09-05 | 380907185 | 1.17 ppm |
| 2018-10-16 | 381019054 | 0.464 ppm |
| 2019-09-05 | 390906123.2 | 0.852 ppm |
| 2019-09-05 | 390906125.2 | 1.25 ppm |
| 2019-09-05 | 390906124.2 | 0.905 ppm |
| 2019-09-17 | 390919104 | 0.868 ppm |
| 2019-09-17 | 390919102 | 0.804 ppm |
| 2019-09-17 | 390919103 | 1.15 ppm |
| 2019-09-18 | 390919105 | 0.829 ppm |
| 2019-09-18 | 390919107 | 1.62 ppm |
| 2019-09-18 | 390919106 | 0.768 ppm |
| 2019-09-26 | 391003168 | 0.909 ppm |
| 2019-10-01 | 391003169 | 0.825 ppm |