Nitrate and nitrite
Pulaski County Public Water Supply District 2
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.
32
Samples
0
Samples exceeding legal limit (MCL)
18
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.312 ppm | 5 | 5 | 0.0430 ppm - 0.650 ppm |
| 2015 | 0.326 ppm | 5 | 5 | 0.0730 ppm - 0.630 ppm |
| 2016 | 0.413 ppm | 5 | 5 | 0.0380 ppm - 1.02 ppm |
| 2017 | 0.325 ppm | 5 | 5 | 0.0290 ppm - 0.710 ppm |
| 2018 | 0.286 ppm | 6 | 5 | ND - 0.690 ppm |
| 2019 | 0.288 ppm | 6 | 5 | ND - 0.740 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 |
|---|---|---|
| 2014-03-04 | AC18709 | 0.0750 ppm |
| 2014-03-04 | AC18710 | 0.650 ppm |
| 2014-03-04 | AC18711 | 0.0430 ppm |
| 2014-03-04 | AC18712 | 0.250 ppm |
| 2014-03-04 | AC18708 | 0.540 ppm |
| 2015-02-25 | AC42281 | 0.630 ppm |
| 2015-02-25 | AC42280 | 0.530 ppm |
| 2015-02-25 | AC42283 | 0.0880 ppm |
| 2015-02-25 | AC42282 | 0.0730 ppm |
| 2015-02-25 | AC42279 | 0.310 ppm |
| 2016-02-09 | AC66720 | 0.0380 ppm |
| 2016-02-09 | AC66718 | 0.0770 ppm |
| 2016-02-09 | AC66719 | 0.570 ppm |
| 2016-02-09 | AC66717 | 0.360 ppm |
| 2016-02-09 | AC66721 | 1.02 ppm |
| 2017-02-03 | AC91163 | 0.530 ppm |
| 2017-02-03 | AC91165 | 0.280 ppm |
| 2017-02-03 | AC91164 | 0.710 ppm |
| 2017-02-03 | AC91162 | 0.0290 ppm |
| 2017-02-03 | AC91161 | 0.0750 ppm |
| 2018-02-07 | AD14600 | 0.550 ppm |
| 2018-02-28 | AD14551 | 0.270 ppm |
| 2018-02-28 | AD14553 | 0.690 ppm |
| 2018-02-28 | AD14554 | 0.0840 ppm |
| 2018-02-28 | AD14555 | 0.120 ppm |
| 2018-03-05 | AD17400 | ND |
| 2019-02-13 | AD39726 | ND |
| 2019-02-13 | AD39727 | 0.0900 ppm |
| 2019-02-13 | AD39728 | 0.740 ppm |
| 2019-02-13 | AD39729 | 0.0390 ppm |
| 2019-02-13 | AD39730 | 0.300 ppm |
| 2019-02-13 | AD39731 | 0.560 ppm |