Nitrate and nitrite
Dayton Public Water System
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.
98
Samples
0
Samples exceeding legal limit (MCL)
92
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.776 ppm | 23 | 23 | 0.131 ppm - 1.53 ppm |
| 2015 | 0.775 ppm | 16 | 16 | 0.104 ppm - 1.79 ppm |
| 2016 | 0.769 ppm | 24 | 23 | ND - 1.57 ppm |
| 2017 | 0.918 ppm | 18 | 18 | 0.109 ppm - 1.65 ppm |
| 2018 | 0.913 ppm | 17 | 17 | 0.285 ppm - 1.68 ppm |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-02-11 | 140213-95-04 | 1.16 ppm |
| 2014-02-11 | 140213-95-02 | 0.456 ppm |
| 2014-02-11 | 140213-96-01 | 0.701 ppm |
| 2014-03-05 | 140307-80-01 | 1.36 ppm |
| 2014-03-05 | 140307-81-03 | 0.577 ppm |
| 2014-03-05 | 140307-81-01 | 1.33 ppm |
| 2014-05-12 | 140513-92-01 | 0.498 ppm |
| 2014-05-12 | 140516-68-01 | 1.53 ppm |
| 2014-05-12 | 140516-70-01 | 0.479 ppm |
| 2014-06-11 | 140612-114-01 | 0.933 ppm |
| 2014-06-11 | 140612-114-03 | 0.241 ppm |
| 2014-06-11 | 140612-115-01 | 1.17 ppm |
| 2014-07-07 | 140709-66-01 | 0.544 ppm |
| 2014-07-07 | 140709-64-03 | 0.552 ppm |
| 2014-07-07 | 140709-64-01 | 1.30 ppm |
| 2014-09-09 | 140910-71-01 | 0.737 ppm |
| 2014-09-09 | 140910-71-03 | 0.262 ppm |
| 2014-09-09 | 140910-73-01 | 0.833 ppm |
| 2014-10-07 | 141007-63-01 | 0.902 ppm |
| 2014-10-08 | 141009-60-02 | 0.199 ppm |
| 2014-10-08 | 141009-60-04 | 0.897 ppm |
| 2014-11-03 | 141104-54-01 | 1.06 ppm |
| 2014-11-03 | 141104-54-03 | 0.131 ppm |
| 2015-04-08 | 150409-27-01 | 0.489 ppm |
| 2015-04-08 | 150409-25-02 | 1.79 ppm |
| 2015-04-08 | 150409-25-04 | 0.504 ppm |
| 2015-05-11 | 150512-36-01 | 1.19 ppm |
| 2015-05-11 | 150512-40-02 | 0.401 ppm |
| 2015-05-11 | 150512-40-04 | 1.14 ppm |
| 2015-06-09 | 150609-44-02 | 1.02 ppm |
| 2015-06-09 | 150609-44-04 | 0.620 ppm |
| 2015-10-12 | 151013-38-02 | 1.44 ppm |
| 2015-10-12 | 151013-38-04 | 0.256 ppm |
| 2015-10-13 | 151013-41-01 | 0.243 ppm |
| 2015-11-03 | 151105-32-01 | 1.07 ppm |
| 2015-11-03 | 151105-31-04 | 1.03 ppm |
| 2015-11-03 | 151105-31-02 | 0.104 ppm |
| 2015-12-07 | 151208-37-01-1 | 0.225 ppm |
| 2015-12-07 | 151208-37-02-1 | 0.871 ppm |
| 2016-01-11 | 160111-28-01 | 0.987 ppm |
| 2016-01-11 | 160111-28-02 | 0.567 ppm |
| 2016-02-01 | 160202-37-01 | 0.112 ppm |
| 2016-02-01 | 160202-38-02 | 0.917 ppm |
| 2016-02-01 | 160202-40-01 | 0.914 ppm |
| 2016-03-02 | 160303-27-01 | 1.06 ppm |
| 2016-03-02 | 160303-29-01 | 0.421 ppm |
| 2016-03-02 | 160303-29-03 | 1.30 ppm |
| 2016-04-04 | 160407-36-01 | 0.864 ppm |
| 2016-04-04 | 160407-31-02 | 0.389 ppm |
| 2016-04-04 | 160407-31-04 | 1.57 ppm |
| 2016-06-06 | 160613-31-02 | 1.03 ppm |
| 2016-06-06 | 160613-31-04 | 0.589 ppm |
| 2016-07-06 | 160708-23-01 | 0.545 ppm |
| 2016-07-06 | 160708-26-01 | 1.17 ppm |
| 2016-07-06 | 160708-26-02 | 0.612 ppm |
| 2016-09-06 | 160908-38-02 | 0.123 ppm |
| 2016-09-06 | 160908-38-04 | 1.04 ppm |
| 2016-10-03 | 161005-27-01 | 0.756 ppm |
| 2016-10-03 | 161005-26-01 | 1.07 ppm |
| 2016-10-03 | 161005-26-02 | ND |
| 2016-11-08 | 161110-35-01 | 0.872 ppm |
| 2016-11-08 | 161110-34-04 | 1.11 ppm |
| 2016-11-08 | 161110-34-02 | 0.428 ppm |
| 2017-04-05 | 170406-40-04-IC | 0.519 ppm |
| 2017-04-05 | 170406-40-02-IC | 0.944 ppm |
| 2017-04-05 | 170411-46-01-IC | 0.949 ppm |
| 2017-07-10 | 170711-44-04IC | 0.709 ppm |
| 2017-07-10 | 170711-44-02IC | 1.24 ppm |
| 2017-07-10 | 170711-45-01IC | 0.980 ppm |
| 2017-09-05 | 170907-30-04IC | 0.657 ppm |
| 2017-09-05 | 170907-30-02IC | 1.61 ppm |
| 2017-09-05 | 170907-31-01IC | 1.65 ppm |
| 2017-10-03 | 171004-38-04-IC | 0.109 ppm |
| 2017-10-03 | 171004-39-01-IC | 1.12 ppm |
| 2017-10-03 | 171004-38-03-IC | 1.33 ppm |
| 2017-11-01 | 171102-35-02IC | 1.29 ppm |
| 2017-11-01 | 171102-37-01IC | 0.914 ppm |
| 2017-11-01 | 171102-35-04IC | 0.204 ppm |
| 2017-12-04 | 171206-22-04IC | 0.564 ppm |
| 2017-12-04 | 171206-23-01IC | 0.418 ppm |
| 2017-12-04 | 171206-22-03IC | 1.31 ppm |
| 2018-01-08 | 180109-47-03IC | 0.596 ppm |
| 2018-01-08 | 180109-48-01IC | 0.689 ppm |
| 2018-01-08 | 180109-47-04IC | 0.555 ppm |
| 2018-02-01 | 180206-41-01IC | 0.794 ppm |
| 2018-02-07 | 180208-36-04IC | 0.408 ppm |
| 2018-02-07 | 180208-36-02IC | 1.40 ppm |
| 2018-02-07 | 180208-37-01IC | 1.35 ppm |
| 2018-03-05 | 180306-42-04IC | 0.514 ppm |
| 2018-03-05 | 180306-42-02IC | 1.57 ppm |
| 2018-03-05 | 180306-43-01IC | 1.37 ppm |
| 2018-05-07 | 180508-41-04-IC | 0.518 ppm |
| 2018-05-07 | 180508-41-02-IC | 1.21 ppm |
| 2018-05-07 | 180508-42-01-IC | 0.514 ppm |
| 2018-06-05 | 180605-42-04-IC | 0.285 ppm |
| 2018-06-05 | 180605-42-02-IC | 1.48 ppm |
| 2018-08-07 | 180808-27-02-IC | 0.587 ppm |
| 2018-08-07 | 180808-27-04-IC | 1.68 ppm |