Nitrate
North Penn Water Authority
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.
190
Samples
0
Samples exceeding legal limit (MCL)
186
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.34 ppm | 30 | 30 | 0.114 ppm - 4.50 ppm |
| 2015 | 2.17 ppm | 31 | 31 | 0.155 ppm - 4.44 ppm |
| 2016 | 2.35 ppm | 33 | 32 | ND - 4.34 ppm |
| 2017 | 2.55 ppm | 34 | 34 | 0.117 ppm - 4.67 ppm |
| 2018 | 2.49 ppm | 32 | 32 | 0.162 ppm - 4.52 ppm |
| 2019 | 2.76 ppm | 30 | 29 | ND - 4.81 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 |
|---|---|---|
| 2014-02-24 | 20140682 | 4.50 ppm |
| 2014-02-24 | 20140683 | 3.22 ppm |
| 2014-02-24 | 20140684 | 3.50 ppm |
| 2014-04-23 | 20141402 | 0.741 ppm |
| 2014-04-23 | 20141403 | 3.95 ppm |
| 2014-04-23 | 20141404 | 3.26 ppm |
| 2014-04-23 | 20141405 | 2.45 ppm |
| 2014-04-23 | 20141406 | 1.56 ppm |
| 2014-04-23 | 20141407 | 2.45 ppm |
| 2014-04-23 | 20141408 | 2.55 ppm |
| 2014-05-19 | 20141691 | 0.855 ppm |
| 2014-05-19 | 20141692 | 1.08 ppm |
| 2014-05-19 | 20141693 | 3.12 ppm |
| 2014-05-19 | 20141694 | 2.19 ppm |
| 2014-05-19 | 20141695 | 0.470 ppm |
| 2014-07-16 | 20142439 | 0.821 ppm |
| 2014-07-16 | 20142440 | 4.08 ppm |
| 2014-07-16 | 20142441 | 3.54 ppm |
| 2014-07-16 | 20142451 | 1.72 ppm |
| 2014-07-16 | 20142442 | 2.43 ppm |
| 2014-07-16 | 20142443 | 2.55 ppm |
| 2014-08-18 | 20142816 | 0.841 ppm |
| 2014-08-18 | 20142817 | 1.05 ppm |
| 2014-08-18 | 20142818 | 2.56 ppm |
| 2014-08-18 | 20142819 | 1.88 ppm |
| 2014-08-18 | 20142821 | 2.60 ppm |
| 2014-08-18 | 20142820 | 0.114 ppm |
| 2014-11-10 | 20143813 | 4.09 ppm |
| 2014-11-10 | 20143814 | 2.52 ppm |
| 2014-11-10 | 20143815 | 3.43 ppm |
| 2015-01-19 | 12287139 | 4.35 ppm |
| 2015-01-19 | 12287142 | 2.93 ppm |
| 2015-01-19 | 12287145 | 3.08 ppm |
| 2015-04-20 | 12633064 | 0.657 ppm |
| 2015-04-20 | 12633067 | 4.44 ppm |
| 2015-04-20 | 12633070 | 3.15 ppm |
| 2015-04-20 | 12633073 | 2.51 ppm |
| 2015-04-20 | 12633076 | 1.53 ppm |
| 2015-04-20 | 12633079 | 2.28 ppm |
| 2015-04-20 | 12633082 | 2.33 ppm |
| 2015-05-19 | 12749686 | 0.798 ppm |
| 2015-05-19 | 12749689 | 1.08 ppm |
| 2015-05-19 | 12749692 | 3.01 ppm |
| 2015-05-19 | 12749695 | 1.68 ppm |
| 2015-05-19 | 12749698 | 0.155 ppm |
| 2015-07-13 | 13012672 | 0.698 ppm |
| 2015-07-13 | 13012674 | 4.12 ppm |
| 2015-07-13 | 13012676 | 3.36 ppm |
| 2015-07-13 | 13012678 | 2.47 ppm |
| 2015-07-13 | 13012680 | 1.39 ppm |
| 2015-07-13 | 13012682 | 2.26 ppm |
| 2015-07-13 | 13012684 | 2.50 ppm |
| 2015-08-17 | 13135648 | 0.773 ppm |
| 2015-08-17 | 13135651 | 1.01 ppm |
| 2015-08-17 | 13135654 | 2.19 ppm |
| 2015-08-17 | 13135657 | 1.55 ppm |
| 2015-08-17 | 13135660 | 0.182 ppm |
| 2015-10-05 | 13389202 | 3.94 ppm |
| 2015-10-05 | 13389204 | 2.30 ppm |
| 2015-10-05 | 13389206 | 3.41 ppm |
| 2015-12-09 | 13633286 | 1.02 ppm |
| 2016-01-18 | 13752777 | 3.90 ppm |
| 2016-01-18 | 13752779 | 3.27 ppm |
| 2016-01-18 | 13752781 | 3.60 ppm |
| 2016-04-25 | 14102817 | 0.707 ppm |
| 2016-04-25 | 14102819 | 1.55 ppm |
| 2016-04-25 | 14102821 | 3.49 ppm |
| 2016-04-25 | 14102823 | 2.48 ppm |
| 2016-04-25 | 14102825 | 1.55 ppm |
| 2016-04-25 | 14102827 | 2.30 ppm |
| 2016-04-25 | 14102829 | 2.06 ppm |
| 2016-05-16 | 14250787 | 0.825 ppm |
| 2016-05-16 | 14250789 | 1.12 ppm |
| 2016-05-16 | 14250791 | 4.30 ppm |
| 2016-05-16 | 14250793 | 3.22 ppm |
| 2016-05-16 | 14250795 | 1.91 ppm |
| 2016-05-16 | 14250797 | 0.297 ppm |
| 2016-07-18 | 14569931 | 0.653 ppm |
| 2016-07-18 | 14569933 | 3.97 ppm |
| 2016-07-18 | 14569935 | 3.83 ppm |
| 2016-07-18 | 14569937 | 2.50 ppm |
| 2016-07-18 | 14569939 | 1.77 ppm |
| 2016-07-18 | 14569941 | 2.40 ppm |
| 2016-07-18 | 14569943 | 2.50 ppm |
| 2016-08-15 | 14735592 | 0.801 ppm |
| 2016-08-15 | 14735594 | 1.02 ppm |
| 2016-08-15 | 14735596 | 2.61 ppm |
| 2016-08-15 | 14735598 | 1.60 ppm |
| 2016-08-15 | 14735600 | ND |
| 2016-08-23 | 14735729 | 4.34 ppm |
| 2016-10-03 | 14908623 | 3.87 ppm |
| 2016-10-03 | 14908625 | 2.02 ppm |
| 2016-10-03 | 14908627 | 4.03 ppm |
| 2016-10-03 | 14908629 | 3.17 ppm |
| 2017-01-23 | 15517182 | 4.08 ppm |
| 2017-01-23 | 15517184 | 3.41 ppm |
| 2017-01-23 | 15517186 | 3.85 ppm |
| 2017-01-23 | 15517188 | 4.21 ppm |
| 2017-04-03 | 15796064 | 0.706 ppm |
| 2017-04-03 | 15796066 | 4.29 ppm |
| 2017-04-03 | 15796068 | 3.57 ppm |
| 2017-04-03 | 15796070 | 3.63 ppm |
| 2017-04-03 | 15796072 | 2.39 ppm |
| 2017-04-03 | 15796074 | 1.51 ppm |
| 2017-04-03 | 15796076 | 2.21 ppm |
| 2017-05-02 | 15937832 | 2.41 ppm |
| 2017-05-15 | 16094554 | 0.839 ppm |
| 2017-05-15 | 16094556 | 1.13 ppm |
| 2017-05-15 | 16094558 | 3.49 ppm |
| 2017-05-15 | 16094560 | 2.37 ppm |
| 2017-05-15 | 16094562 | 0.245 ppm |
| 2017-07-24 | 16413283 | 0.653 ppm |
| 2017-07-24 | 16413285 | 4.67 ppm |
| 2017-07-24 | 16413287 | 3.95 ppm |
| 2017-07-24 | 16413289 | 3.45 ppm |
| 2017-07-24 | 16413291 | 2.52 ppm |
| 2017-07-24 | 16413293 | 1.65 ppm |
| 2017-07-24 | 16413295 | 2.43 ppm |
| 2017-07-24 | 16413297 | 2.57 ppm |
| 2017-08-14 | 16566048 | 0.796 ppm |
| 2017-08-14 | 16566050 | 1.09 ppm |
| 2017-08-14 | 16566052 | 2.47 ppm |
| 2017-08-14 | 16566054 | 1.80 ppm |
| 2017-08-14 | 16566056 | 0.117 ppm |
| 2017-10-02 | 16727442 | 4.51 ppm |
| 2017-10-02 | 16727444 | 2.58 ppm |
| 2017-10-02 | 16727446 | 3.59 ppm |
| 2017-10-02 | 16727448 | 3.51 ppm |
| 2018-01-22 | 20180287 | 4.25 ppm |
| 2018-01-22 | 20180288 | 3.39 ppm |
| 2018-01-22 | 20180289 | 4.13 ppm |
| 2018-01-22 | 20180290 | 4.13 ppm |
| 2018-04-02 | 20181248 | 0.688 ppm |
| 2018-04-02 | 20181249 | 4.52 ppm |
| 2018-04-02 | 20181250 | 4.03 ppm |
| 2018-04-02 | 20181251 | 4.11 ppm |
| 2018-04-02 | 20181252 | 2.51 ppm |
| 2018-04-02 | 20181253 | 1.46 ppm |
| 2018-04-02 | 20181254 | 2.71 ppm |
| 2018-05-14 | 20181906 | 0.858 ppm |
| 2018-05-14 | 20181907 | 1.08 ppm |
| 2018-05-14 | 20181908 | 3.33 ppm |
| 2018-05-14 | 20181910 | 1.98 ppm |
| 2018-05-14 | 20181909 | 0.247 ppm |
| 2018-06-04 | 20182087 | 2.13 ppm |
| 2018-07-23 | 20182808 | 0.752 ppm |
| 2018-07-23 | 20182809 | 4.03 ppm |
| 2018-07-23 | 20182810 | 3.90 ppm |
| 2018-07-23 | 20182811 | 2.54 ppm |
| 2018-07-23 | 20182812 | 1.62 ppm |
| 2018-07-23 | 20182813 | 2.52 ppm |
| 2018-07-23 | 20182814 | 2.60 ppm |
| 2018-08-13 | 20183084 | 0.749 ppm |
| 2018-08-13 | 20183085 | 1.04 ppm |
| 2018-08-13 | 20183086 | 2.38 ppm |
| 2018-08-13 | 20183087 | 1.64 ppm |
| 2018-08-13 | 20183088 | 0.162 ppm |
| 2018-10-01 | 20183729 | 3.00 ppm |
| 2018-10-01 | 20183730 | 3.97 ppm |
| 2018-11-07 | 20184247 | 3.30 ppm |
| 2019-01-21 | 20190216 | 3.81 ppm |
| 2019-01-21 | 20190217 | 3.61 ppm |
| 2019-01-21 | 20190218 | 4.76 ppm |
| 2019-04-01 | 20191189 | 0.912 ppm |
| 2019-04-01 | 20191190 | 1.03 ppm |
| 2019-04-01 | 20191191 | 0.687 ppm |
| 2019-04-01 | 20191192 | 3.74 ppm |
| 2019-04-01 | 20191193 | 4.34 ppm |
| 2019-04-01 | 20191194 | 2.76 ppm |
| 2019-05-21 | 9054400-01 | 4.81 ppm |
| 2019-05-21 | 9054400-02 | 3.50 ppm |
| 2019-05-21 | 9054400-03 | 2.71 ppm |
| 2019-05-21 | 9054400-04 | 2.91 ppm |
| 2019-05-21 | 9054400-05 | ND |
| 2019-06-25 | 9065221-01 | 1.86 ppm |
| 2019-08-05 | 20192971 | 0.968 ppm |
| 2019-08-05 | 20192972 | 1.21 ppm |
| 2019-08-05 | 20192973 | 0.717 ppm |
| 2019-08-05 | 20192974 | 2.96 ppm |
| 2019-08-19 | 20193286 | 4.81 ppm |
| 2019-08-19 | 20193281 | 1.48 ppm |
| 2019-08-19 | 20193287 | 3.88 ppm |
| 2019-08-19 | 20193282 | 3.91 ppm |
| 2019-08-19 | 20193283 | 2.81 ppm |
| 2019-08-19 | 20193284 | 2.22 ppm |
| 2019-08-19 | 20193285 | 0.165 ppm |
| 2019-11-18 | 20194550 | 4.76 ppm |
| 2019-11-18 | 20194551 | 3.18 ppm |
| 2019-11-18 | 20194552 | 3.74 ppm |
| 2019-11-18 | 20194553 | 4.51 ppm |