Nitrate
Clwsc Canyon Lake Shores
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 | 0.618 ppm | 19 | 19 | 0.0200 ppm - 2.66 ppm |
| 2015 | 0.612 ppm | 20 | 19 | ND - 2.57 ppm |
| 2016 | 0.732 ppm | 19 | 19 | 0.0200 ppm - 2.61 ppm |
| 2017 | 0.682 ppm | 18 | 18 | 0.01000 ppm - 2.48 ppm |
| 2018 | 0.670 ppm | 14 | 14 | 0.01000 ppm - 2.40 ppm |
| 2019 | 0.702 ppm | 14 | 12 | ND - 2.24 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 |
|---|---|---|
| 2014-02-18 | AC43284 | 0.130 ppm |
| 2014-02-18 | AC43281 | 0.990 ppm |
| 2014-02-18 | AC43278 | 0.960 ppm |
| 2014-02-18 | AC43279 | 0.500 ppm |
| 2014-04-30 | AC52236 | 0.0200 ppm |
| 2014-04-30 | AC52237 | 1.22 ppm |
| 2014-04-30 | AC52242 | 0.0800 ppm |
| 2014-04-30 | AC52259 | 1.10 ppm |
| 2014-09-03 | AC65565 | 2.66 ppm |
| 2014-09-03 | AC65566 | 0.0200 ppm |
| 2014-09-03 | AC65590 | 0.1000 ppm |
| 2014-09-03 | AC65587 | 0.850 ppm |
| 2014-09-03 | AC65574 | 0.950 ppm |
| 2014-10-08 | AC69078 | 0.200 ppm |
| 2014-10-08 | AC69108 | 0.570 ppm |
| 2014-10-08 | AC69095 | 0.310 ppm |
| 2014-10-08 | AC69097 | 0.0400 ppm |
| 2014-10-08 | AC69096 | 0.980 ppm |
| 2014-10-08 | AC69104 | 0.0600 ppm |
| 2015-02-03 | AC78918 | 0.0200 ppm |
| 2015-02-03 | AC78924 | 0.740 ppm |
| 2015-02-03 | AC78917 | 0.130 ppm |
| 2015-02-03 | AC78919 | 0.950 ppm |
| 2015-02-03 | AC78909 | 0.950 ppm |
| 2015-03-26 | AC86187 | 0.220 ppm |
| 2015-03-26 | AC86188 | 0.1000 ppm |
| 2015-03-26 | AC86172 | 0.0700 ppm |
| 2015-03-26 | AC86173 | 0.170 ppm |
| 2015-03-26 | AC86171 | 0.190 ppm |
| 2015-03-26 | AC86174 | 0.0200 ppm |
| 2015-03-26 | AC86170 | 0.700 ppm |
| 2015-05-13 | AC91741 | 2.57 ppm |
| 2015-05-13 | AC91739 | 1.000 ppm |
| 2015-08-12 | AD03723 | 1.23 ppm |
| 2015-08-12 | AD03724 | 0.110 ppm |
| 2015-08-12 | AD03739 | ND |
| 2015-08-12 | AD03729 | 1.13 ppm |
| 2015-11-03 | AD12285 | 1.21 ppm |
| 2015-12-07 | AD15615 | 0.730 ppm |
| 2016-02-03 | AD21712 | 1.65 ppm |
| 2016-02-03 | AD21715 | 0.380 ppm |
| 2016-02-03 | AD21716 | 1.12 ppm |
| 2016-02-03 | AD21698 | 1.12 ppm |
| 2016-02-03 | AD21697 | 0.0200 ppm |
| 2016-03-09 | AD27772 | 1.18 ppm |
| 2016-03-09 | AD27785 | 0.700 ppm |
| 2016-03-09 | AD27784 | 1.08 ppm |
| 2016-03-09 | AD27757 | 2.61 ppm |
| 2016-03-09 | AD27756 | 0.120 ppm |
| 2016-03-09 | AD27754 | 0.350 ppm |
| 2016-03-09 | AD27755 | 0.0700 ppm |
| 2016-04-27 | AD34316 | 0.0400 ppm |
| 2016-04-27 | AD34317 | 0.390 ppm |
| 2016-04-27 | AD34295 | 0.820 ppm |
| 2016-07-26 | AD45578 | 0.0200 ppm |
| 2016-07-26 | AD45577 | 0.320 ppm |
| 2016-07-26 | AD45576 | 1.11 ppm |
| 2016-10-04 | AD52406 | 0.810 ppm |
| 2017-01-25 | AD66649 | 0.300 ppm |
| 2017-01-25 | AD66640 | 0.750 ppm |
| 2017-01-25 | AD66639 | 0.0200 ppm |
| 2017-01-25 | AD66638 | 1.18 ppm |
| 2017-02-24 | AD71925 | 2.48 ppm |
| 2017-02-24 | AD71926 | 0.900 ppm |
| 2017-04-11 | AD79102 | 0.370 ppm |
| 2017-04-11 | AD79099 | 1.39 ppm |
| 2017-04-11 | AD79100 | 1.34 ppm |
| 2017-04-11 | AD79101 | 0.880 ppm |
| 2017-06-27 | AD87868 | 0.0900 ppm |
| 2017-06-27 | AD87867 | 0.160 ppm |
| 2017-06-27 | AD87855 | 0.01000 ppm |
| 2017-06-27 | AD87856 | 0.1000 ppm |
| 2017-07-24 | AD90220 | 0.0400 ppm |
| 2017-07-24 | AD90219 | 0.990 ppm |
| 2017-10-05 | AD99446 | 0.320 ppm |
| 2017-10-05 | AD99428 | 0.960 ppm |
| 2018-02-07 | AE12647 | 0.230 ppm |
| 2018-02-07 | AE12648 | 0.0700 ppm |
| 2018-02-07 | AE12631 | 1.000 ppm |
| 2018-05-16 | AE26500 | 0.170 ppm |
| 2018-05-16 | AE26485 | 1.65 ppm |
| 2018-05-16 | AE26486 | 1.48 ppm |
| 2018-05-16 | AE26501 | 0.0600 ppm |
| 2018-05-17 | AE26680 | 0.01000 ppm |
| 2018-05-17 | AE26679 | 2.40 ppm |
| 2018-05-17 | AE26681 | 0.01000 ppm |
| 2018-05-17 | AE26655 | 1.12 ppm |
| 2018-05-17 | AE26656 | 0.0900 ppm |
| 2018-05-17 | AE26657 | 0.960 ppm |
| 2018-07-26 | AE34613 | 0.130 ppm |
| 2019-02-06 | AE53057 | 1.23 ppm |
| 2019-02-06 | AE53045 | 0.550 ppm |
| 2019-02-06 | AE53033 | 0.370 ppm |
| 2019-04-23 | AE63288 | 0.960 ppm |
| 2019-04-23 | AE63287 | 0.390 ppm |
| 2019-04-23 | AE63281 | 0.0700 ppm |
| 2019-04-23 | Q1916427002 | 0.0393 ppm |
| 2019-08-20 | AE79722 | 0.970 ppm |
| 2019-10-29 | AE87784 | 2.24 ppm |
| 2019-10-29 | AE87783 | ND |
| 2019-10-30 | AE87901 | 1.78 ppm |
| 2019-10-30 | AE87902 | 1.01 ppm |
| 2019-10-30 | AE87900 | 0.220 ppm |
| 2019-10-30 | AE87886 | ND |