Nitrate
Defiance City
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.
166
Samples
0
Samples exceeding legal limit (MCL)
165
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 1.85 ppm | 12 | 12 | 0.789 ppm - 3.13 ppm |
| 2015 | 2.14 ppm | 15 | 15 | 0.130 ppm - 4.79 ppm |
| 2016 | 1.90 ppm | 12 | 12 | 1.03 ppm - 3.32 ppm |
| 2017 | 1.94 ppm | 12 | 12 | 0.660 ppm - 3.90 ppm |
| 2018 | 1.28 ppm | 33 | 33 | 0.688 ppm - 2.93 ppm |
| 2019 | 1.19 ppm | 82 | 82 | 0.161 ppm - 1.98 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 |
|---|---|---|
| 2014-01-23 | 140159 | 2.32 ppm |
| 2014-02-07 | 140264 | 2.53 ppm |
| 2014-03-06 | 140453 | 3.13 ppm |
| 2014-04-09 | 140689 | 2.36 ppm |
| 2014-05-08 | 140894 | 2.14 ppm |
| 2014-06-02 | 141065 | 1.89 ppm |
| 2014-07-10 | 141333 | 1.50 ppm |
| 2014-08-04 | 141506 | 0.847 ppm |
| 2014-09-19 | 141830 | 0.789 ppm |
| 2014-10-27 | 142098 | 1.13 ppm |
| 2014-11-23 | 142287 | 1.60 ppm |
| 2014-12-26 | 142518 | 1.91 ppm |
| 2015-01-26 | 150178 | 3.30 ppm |
| 2015-01-26 | 1500178 | 3.30 ppm |
| 2015-02-15 | 150318 | 3.52 ppm |
| 2015-02-15 | 1500318 | 3.52 ppm |
| 2015-03-01 | 1500416 | 4.79 ppm |
| 2015-04-05 | 1500661 | 2.85 ppm |
| 2015-05-03 | 1500857 | 2.72 ppm |
| 2015-06-12 | 15-18049-01A | 1.68 ppm |
| 2015-07-10 | 15-19630-01 | 0.850 ppm |
| 2015-08-04 | 1501508 | 0.669 ppm |
| 2015-08-14 | 15-21678-01 | 0.130 ppm |
| 2015-09-26 | 1501879 | 1.43 ppm |
| 2015-10-09 | 1501972 | 0.873 ppm |
| 2015-11-29 | 1502327 | 1.16 ppm |
| 2015-12-10 | 1502406 | 1.33 ppm |
| 2016-01-17 | 1600117 | 1.74 ppm |
| 2016-02-21 | 1600360 | 2.79 ppm |
| 2016-03-06 | 1600460 | 3.32 ppm |
| 2016-04-17 | 1600754 | 2.47 ppm |
| 2016-05-08 | 1600901 | 1.97 ppm |
| 2016-06-17 | 1601179 | 1.31 ppm |
| 2016-07-17 | 1601389 | 1.64 ppm |
| 2016-08-29 | 1601692 | 1.14 ppm |
| 2016-09-20 | 1601846 | 1.03 ppm |
| 2016-10-28 | 1602112 | 1.52 ppm |
| 2016-11-22 | 1602287 | 1.99 ppm |
| 2016-12-08 | 1602399 | 1.84 ppm |
| 2017-01-02 | 1700010 | 3.17 ppm |
| 2017-02-26 | 1700397 | 3.87 ppm |
| 2017-03-05 | 1700446 | 3.90 ppm |
| 2017-04-16 | 1700740 | 2.77 ppm |
| 2017-05-12 | 1700922 | 1.96 ppm |
| 2017-06-08 | 1701111 | 1.50 ppm |
| 2017-07-05 | 1701298 | 0.823 ppm |
| 2017-08-31 | 1701700 | 0.660 ppm |
| 2017-09-10 | 1701769 | 0.825 ppm |
| 2017-10-08 | 1701965 | 0.944 ppm |
| 2017-11-21 | 1702273 | 0.997 ppm |
| 2017-12-21 | 1702483 | 1.90 ppm |
| 2018-01-09 | 1800059 | 2.66 ppm |
| 2018-02-08 | 1800271 | 2.93 ppm |
| 2018-03-09 | 1800474 | 2.80 ppm |
| 2018-04-13 | 1800717 | 1.96 ppm |
| 2018-05-01 | 1800843 | 2.00 ppm |
| 2018-06-12 | 1801139 | 1.90 ppm |
| 2018-07-01 | 1801272 | 0.688 ppm |
| 2018-08-28 | 1801678 | 1.61 ppm |
| 2018-09-26 | 1801881 | 0.906 ppm |
| 2018-10-02 | 1801923 | 0.894 ppm |
| 2018-10-11 | 1801986 | 0.792 ppm |
| 2018-10-14 | 1802005 | 0.760 ppm |
| 2018-10-17 | 1802028 | 0.706 ppm |
| 2018-10-21 | 1802054 | 0.791 ppm |
| 2018-10-26 | 1802091 | 0.885 ppm |
| 2018-10-28 | 1802103 | 0.765 ppm |
| 2018-11-02 | 1802140 | 0.924 ppm |
| 2018-11-04 | 1802152 | 0.850 ppm |
| 2018-11-08 | 1802182 | 0.899 ppm |
| 2018-11-15 | 1802231 | 0.868 ppm |
| 2018-11-18 | 1802250 | 0.833 ppm |
| 2018-11-21 | 1802271 | 0.825 ppm |
| 2018-11-25 | 1802299 | 0.872 ppm |
| 2018-11-28 | 1802322 | 0.882 ppm |
| 2018-12-01 | 1802341 | 0.860 ppm |
| 2018-12-06 | 1802376 | 0.854 ppm |
| 2018-12-09 | 1802397 | 0.884 ppm |
| 2018-12-12 | 1802418 | 1.20 ppm |
| 2018-12-16 | 1802446 | 1.48 ppm |
| 2018-12-19 | 1802467 | 1.58 ppm |
| 2018-12-23 | 1802495 | 1.70 ppm |
| 2018-12-27 | 1802523 | 1.76 ppm |
| 2018-12-29 | 1802537 | 1.81 ppm |
| 2019-01-02 | 1900006 | 1.84 ppm |
| 2019-01-04 | 1900024 | 1.82 ppm |
| 2019-01-06 | 1900038 | 1.78 ppm |
| 2019-01-11 | 1900073 | 1.83 ppm |
| 2019-01-14 | 1900094 | 1.88 ppm |
| 2019-01-17 | 1900117 | 1.88 ppm |
| 2019-01-20 | 1900136 | 1.91 ppm |
| 2019-01-24 | 1900164 | 1.98 ppm |
| 2019-01-27 | 1900185 | 1.92 ppm |
| 2019-01-31 | 1900213 | 1.94 ppm |
| 2019-02-03 | 1900234 | 1.89 ppm |
| 2019-02-05 | 1900248 | 1.93 ppm |
| 2019-02-10 | 1900283 | 1.90 ppm |
| 2019-02-13 | 1900304 | 1.88 ppm |
| 2019-02-17 | 1900332 | 1.79 ppm |
| 2019-02-21 | 1900360 | 1.95 ppm |
| 2019-02-24 | 1900381 | 1.86 ppm |
| 2019-02-28 | 1900411 | 1.80 ppm |
| 2019-03-03 | 1900430 | 1.78 ppm |
| 2019-03-07 | 1900460 | 1.87 ppm |
| 2019-03-10 | 1900479 | 1.75 ppm |
| 2019-03-14 | 1900507 | 1.84 ppm |
| 2019-03-17 | 1900528 | 1.81 ppm |
| 2019-03-22 | 1900563 | 1.73 ppm |
| 2019-03-24 | 1900577 | 1.72 ppm |
| 2019-03-29 | 1900614 | 1.73 ppm |
| 2019-03-31 | 1900626 | 1.74 ppm |
| 2019-04-04 | 1900654 | 1.67 ppm |
| 2019-04-07 | 1900675 | 1.63 ppm |
| 2019-04-11 | 1900703 | 1.66 ppm |
| 2019-04-14 | 1900724 | 1.66 ppm |
| 2019-04-17 | 1900747 | 1.78 ppm |
| 2019-04-21 | 1900773 | 1.65 ppm |
| 2019-05-01 | 1900843 | 1.46 ppm |
| 2019-05-05 | 1900871 | 1.41 ppm |
| 2019-05-07 | 1900885 | 1.40 ppm |
| 2019-05-09 | 1900899 | 1.38 ppm |
| 2019-05-12 | 1900920 | 1.39 ppm |
| 2019-05-14 | 1900934 | 1.36 ppm |
| 2019-05-19 | 1900969 | 1.38 ppm |
| 2019-05-25 | 1901011 | 1.32 ppm |
| 2019-05-28 | 1901034 | 1.40 ppm |
| 2019-05-30 | 1901048 | 1.37 ppm |
| 2019-06-03 | 1901074 | 1.26 ppm |
| 2019-06-05 | 1901088 | 1.08 ppm |
| 2019-06-10 | 1901125 | 1.04 ppm |
| 2019-06-12 | 1901139 | 0.820 ppm |
| 2019-06-19 | 1901186 | 1.05 ppm |
| 2019-06-23 | 1901214 | 1.10 ppm |
| 2019-06-25 | 1901228 | 1.05 ppm |
| 2019-06-30 | 1901263 | 0.885 ppm |
| 2019-07-03 | 1901284 | 0.629 ppm |
| 2019-07-09 | 1901328 | 0.421 ppm |
| 2019-07-14 | 1901361 | 0.207 ppm |
| 2019-07-16 | 1901375 | 0.207 ppm |
| 2019-07-19 | 1901396 | 0.172 ppm |
| 2019-07-21 | 1901410 | 0.161 ppm |
| 2019-07-22 | 1901417 | 0.482 ppm |
| 2019-07-23 | 1901426 | 0.481 ppm |
| 2019-07-25 | 1901440 | 0.357 ppm |
| 2019-07-28 | 1901459 | 0.296 ppm |
| 2019-08-01 | 1901489 | 0.681 ppm |
| 2019-08-07 | 1901529 | 0.319 ppm |
| 2019-08-13 | 1901571 | 0.198 ppm |
| 2019-08-17 | 1901606 | 0.318 ppm |
| 2019-08-20 | 1901622 | 0.426 ppm |
| 2019-08-23 | 1901641 | 0.423 ppm |
| 2019-08-25 | 1901655 | 0.561 ppm |
| 2019-08-28 | 1901678 | 0.859 ppm |
| 2019-09-05 | 1901732 | 0.819 ppm |
| 2019-09-08 | 1901753 | 0.751 ppm |
| 2019-09-10 | 1901767 | 0.735 ppm |
| 2019-09-12 | 1901781 | 0.625 ppm |
| 2019-09-15 | 1901802 | 0.599 ppm |
| 2019-09-17 | 1901816 | 0.232 ppm |
| 2019-09-22 | 1901851 | 0.661 ppm |
| 2019-09-26 | 1901879 | 0.670 ppm |
| 2019-10-04 | 1901937 | 0.540 ppm |
| 2019-10-06 | 1901949 | 0.536 ppm |
| 2019-10-08 | 1901965 | 0.607 ppm |
| 2019-10-11 | 1901984 | 0.702 ppm |
| 2019-10-13 | 1901998 | 0.672 ppm |