Nitrate
Julian Community Services District
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 | 0.593 ppm | 17 | 10 | ND - 6.10 ppm |
| 2015 | 0.132 ppm | 17 | 8 | ND - 0.635 ppm |
| 2016 | 0.244 ppm | 19 | 12 | ND - 1.72 ppm |
| 2017 | 0.447 ppm | 18 | 9 | ND - 3.05 ppm |
| 2018 | 0.124 ppm | 15 | 3 | ND - 0.870 ppm |
| 2019 | 0.364 ppm | 11 | 7 | ND - 1.08 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 |
|---|---|---|
| 2014-02-11 | 1931-010-0835 | ND |
| 2014-02-11 | 1931-012-0815 | ND |
| 2014-02-11 | 1931-011-0820 | 0.800 ppm |
| 2014-03-12 | 1931-010-0830 | 0.0565 ppm |
| 2014-04-22 | 1931-012-0808 | ND |
| 2014-04-22 | 1931-011-0800 | 6.10 ppm |
| 2014-04-22 | 1931-010-0830 | ND |
| 2014-07-09 | 1931-010-0845 | 0.361 ppm |
| 2014-08-26 | 1931-013-1011 | ND |
| 2014-08-26 | 1931-012-1004 | 0.0813 ppm |
| 2014-08-26 | 1931-011-0958 | 1.21 ppm |
| 2014-08-26 | 1931-010-1028 | ND |
| 2014-10-22 | 1931-010-1015 | 0.102 ppm |
| 2014-11-20 | 1931-010-0850 | ND |
| 2014-11-25 | 1931-012-0835 | 0.167 ppm |
| 2014-11-25 | 1931-011-0830 | 1.01 ppm |
| 2014-12-18 | 1931-010-0920 | 0.197 ppm |
| 2015-02-11 | 1931-010-0900 | 0.203 ppm |
| 2015-03-18 | 1931-013-0750 | ND |
| 2015-03-18 | 1931-010-0820 | ND |
| 2015-04-08 | 1931-013-0815 | 0.0678 ppm |
| 2015-04-08 | 1931-012-0825 | ND |
| 2015-04-08 | 1931-010-0945 | ND |
| 2015-04-08 | 1931-011-0835 | 0.635 ppm |
| 2015-05-20 | 1931-010-0820 | ND |
| 2015-07-16 | 1931-010-0905 | 0.0520 ppm |
| 2015-07-16 | 1931-011-0852 | 0.549 ppm |
| 2015-07-16 | 1931-013-0847 | ND |
| 2015-07-16 | 1931-012-0856 | ND |
| 2015-11-03 | 1531-002-0830 | 0.0700 ppm |
| 2015-11-11 | 1931-010-0930 | 0.0600 ppm |
| 2015-11-11 | 1931-013-0930 | ND |
| 2015-11-11 | 1931-012-0930 | ND |
| 2015-11-11 | 1931-011-0930 | 0.600 ppm |
| 2016-03-17 | 1931-010-0920 | 0.0600 ppm |
| 2016-03-17 | 1931-013-0910 | 0.0500 ppm |
| 2016-03-17 | 1931-012-0905 | ND |
| 2016-03-17 | 1931-011-0900 | 0.0800 ppm |
| 2016-04-25 | 1931-012-0830 | 1.02 ppm |
| 2016-04-25 | 1931-013-0830 | 0.170 ppm |
| 2016-04-25 | 1931-010-0620 | 0.120 ppm |
| 2016-04-25 | 1931-011-0830 | 1.72 ppm |
| 2016-06-23 | 1931-010-0820 | ND |
| 2016-08-24 | 1931-013-0830 | 0.0800 ppm |
| 2016-08-24 | 1931-010-0906 | ND |
| 2016-08-24 | 1931-012-0838 | 0.0700 ppm |
| 2016-10-19 | 1931-012-0935 | ND |
| 2016-10-19 | 1931-013-0940 | 0.0800 ppm |
| 2016-10-19 | 1931-011-0930 | 1.08 ppm |
| 2016-12-12 | 1931-010-0935 | ND |
| 2016-12-12 | 1931-013-0930 | ND |
| 2016-12-12 | 1931-011-0925 | 0.1000 ppm |
| 2016-12-12 | 1931-012-0930 | ND |
| 2017-01-18 | 1931-010-1155 | ND |
| 2017-03-29 | 1931-010-1030 | 3.05 ppm |
| 2017-03-29 | 1931-012-1045 | 0.0500 ppm |
| 2017-03-30 | 1931-011-1050 | 0.920 ppm |
| 2017-03-30 | 1931-013-1040 | 0.0800 ppm |
| 2017-04-12 | 1931-010-1120 | 0.510 ppm |
| 2017-05-03 | 1931-010-1050 | 0.110 ppm |
| 2017-06-19 | 1931-010-1045 | 2.10 ppm |
| 2017-07-05 | 1931-010-1000 | 0.260 ppm |
| 2017-07-19 | 1931-010-0920 | ND |
| 2017-08-15 | 1931-010-0715 | ND |
| 2017-09-19 | 1931-010-0830 | ND |
| 2017-10-24 | 1931-010-0830 | ND |
| 2017-11-08 | 1931-010-0900 | ND |
| 2017-12-13 | 1931-012-1050 | ND |
| 2017-12-13 | 1931-013-1100 | ND |
| 2017-12-13 | 1931-010-1045 | ND |
| 2017-12-13 | 1931-011-1055 | 0.970 ppm |
| 2018-01-17 | 1931-010-1000 | ND |
| 2018-02-21 | 1931-010-1030 | ND |
| 2018-03-21 | 1931-010-0920 | ND |
| 2018-03-21 | 1931-012-0905 | ND |
| 2018-03-21 | 1931-013-0910 | ND |
| 2018-03-21 | 1931-011-0900 | 0.820 ppm |
| 2018-04-25 | 1931-010-0830 | ND |
| 2018-05-15 | 1931-010-0825 | ND |
| 2018-05-21 | 1931-010-1045 | ND |
| 2018-06-21 | 1931-002-0830 | 0.170 ppm |
| 2018-07-23 | 1931-010-1145 | ND |
| 2018-08-13 | 1931-013-0915 | ND |
| 2018-08-13 | 1931-012-0905 | ND |
| 2018-08-13 | 1931-011-0950 | 0.870 ppm |
| 2018-08-13 | 1931-010-0950 | ND |
| 2019-01-28 | 1931-013-1110 | 0.0600 ppm |
| 2019-01-28 | 1931-012-1105 | ND |
| 2019-01-28 | 1931-011-1100 | 1.08 ppm |
| 2019-01-28 | 1931-010-1125 | ND |
| 2019-05-06 | 1931-011-0930 | 1.04 ppm |
| 2019-06-19 | 1931-012-0930 | ND |
| 2019-08-08 | 1931-010-1020 | 0.700 ppm |
| 2019-10-01 | 1931-013-0900 | ND |
| 2019-10-28 | 1931-013-0924 | 0.0700 ppm |
| 2019-10-28 | 1931-012-0928 | 0.0400 ppm |
| 2019-10-28 | 1931-011-0934 | 1.01 ppm |