Nitrate
City of Highland Village
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.142 ppm | 5 | 5 | 0.0390 ppm - 0.350 ppm |
| 2015 | 0.159 ppm | 5 | 3 | ND - 0.554 ppm |
| 2016 | 0.246 ppm | 5 | 4 | ND - 0.487 ppm |
| 2017 | 0.375 ppm | 5 | 5 | 0.0124 ppm - 0.552 ppm |
| 2018 | 0.186 ppm | 5 | 3 | ND - 0.568 ppm |
| 2019 | 0.106 ppm | 5 | 3 | ND - 0.315 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 |
|---|---|---|
| 2014-08-18 | Q1437308028 | 0.350 ppm |
| 2014-08-18 | Q1437308027 | 0.170 ppm |
| 2014-08-18 | Q1437308026 | 0.0390 ppm |
| 2014-08-18 | Q1437308017 | 0.0580 ppm |
| 2014-08-18 | Q1437308016 | 0.0930 ppm |
| 2015-06-09 | Q1521272001 | 0.554 ppm |
| 2015-06-09 | Q1521272002 | ND |
| 2015-08-13 | Q1531969003 | 0.0160 ppm |
| 2015-08-13 | Q1531969002 | ND |
| 2015-08-13 | Q1531969001 | 0.224 ppm |
| 2016-06-07 | Q1622614011 | 0.459 ppm |
| 2016-06-07 | Q1622614010 | 0.487 ppm |
| 2016-06-07 | Q1622614009 | 0.0255 ppm |
| 2016-06-27 | Q1625972008 | 0.258 ppm |
| 2016-06-27 | Q1625972009 | ND |
| 2017-06-15 | Q1725217034 | 0.543 ppm |
| 2017-06-15 | Q1725217008 | 0.0124 ppm |
| 2017-06-15 | Q1725217033 | 0.541 ppm |
| 2017-06-15 | Q1725217007 | 0.226 ppm |
| 2017-06-15 | Q1725217032 | 0.552 ppm |
| 2018-06-13 | Q1823500020 | 0.348 ppm |
| 2018-06-13 | Q1823500019 | ND |
| 2018-06-13 | Q1823500018 | 0.0123 ppm |
| 2018-06-13 | Q1823500017 | 0.568 ppm |
| 2018-06-13 | Q1823500016 | ND |
| 2019-08-08 | Q1953062011 | ND |
| 2019-08-08 | Q1953062015 | 0.315 ppm |
| 2019-08-08 | Q1953062014 | 0.0168 ppm |
| 2019-08-08 | Q1953062013 | ND |
| 2019-08-08 | Q1953062012 | 0.199 ppm |