Nitrate
Lakewood Water 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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.714 ppm | 22 | 17 | ND - 2.10 ppm |
| 2015 | 0.692 ppm | 24 | 18 | ND - 2.00 ppm |
| 2016 | 0.713 ppm | 24 | 18 | ND - 2.20 ppm |
| 2017 | 0.782 ppm | 22 | 17 | ND - 2.20 ppm |
| 2018 | 0.806 ppm | 23 | 21 | ND - 1.85 ppm |
| 2019 | 0.647 ppm | 20 | 15 | ND - 1.90 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 |
|---|---|---|
| 2014-07-08 | 52943 | 0.400 ppm |
| 2014-07-08 | 52944 | 0.500 ppm |
| 2014-07-08 | 52945 | 0.400 ppm |
| 2014-07-08 | 52955 | 0.700 ppm |
| 2014-07-09 | 52946 | 0.400 ppm |
| 2014-07-09 | 52947 | 0.600 ppm |
| 2014-07-09 | 52948 | 0.300 ppm |
| 2014-07-09 | 52949 | 1.90 ppm |
| 2014-07-09 | 52950 | ND |
| 2014-07-09 | 52951 | 2.00 ppm |
| 2014-07-09 | 52952 | ND |
| 2014-07-09 | 52953 | ND |
| 2014-07-09 | 52954 | 0.800 ppm |
| 2014-07-09 | 52956 | ND |
| 2014-07-09 | 52957 | 0.900 ppm |
| 2014-07-09 | 52958 | 1.40 ppm |
| 2014-07-09 | 52959 | 0.600 ppm |
| 2014-07-10 | 52970 | 0.700 ppm |
| 2014-07-10 | 52971 | 0.900 ppm |
| 2014-07-10 | 52972 | 2.10 ppm |
| 2014-07-10 | 52973 | 1.10 ppm |
| 2014-07-10 | 52974 | ND |
| 2015-07-08 | 57625 | 0.400 ppm |
| 2015-07-08 | 57632 | 0.900 ppm |
| 2015-07-08 | 57631 | ND |
| 2015-07-08 | 57624 | ND |
| 2015-07-08 | 57644 | 0.900 ppm |
| 2015-07-08 | 57634 | 1.30 ppm |
| 2015-07-08 | 57635 | ND |
| 2015-07-08 | 57629 | 1.70 ppm |
| 2015-07-08 | 57630 | ND |
| 2015-07-08 | 57633 | 0.300 ppm |
| 2015-07-08 | 57623 | 0.800 ppm |
| 2015-07-08 | 57627 | 0.400 ppm |
| 2015-07-08 | 57626 | 0.500 ppm |
| 2015-07-08 | 57628 | 1.80 ppm |
| 2015-07-09 | 57639 | ND |
| 2015-07-09 | 57640 | 2.00 ppm |
| 2015-07-09 | 57636 | 1.10 ppm |
| 2015-07-09 | 57643 | 1.70 ppm |
| 2015-07-09 | 57637 | 0.400 ppm |
| 2015-07-09 | 57642 | 0.600 ppm |
| 2015-07-09 | 57641 | 0.400 ppm |
| 2015-07-09 | 57638 | 0.400 ppm |
| 2015-07-13 | 57707 | ND |
| 2015-07-28 | 57873 | 1.000 ppm |
| 2016-07-13 | 0.800 ppm | |
| 2016-07-13 | 0.900 ppm | |
| 2016-07-13 | 0.800 ppm | |
| 2016-07-13 | 0.400 ppm | |
| 2016-07-13 | ND | |
| 2016-07-13 | 2.20 ppm | |
| 2016-07-13 | 1.80 ppm | |
| 2016-07-13 | 1.20 ppm | |
| 2016-07-13 | ND | |
| 2016-07-13 | 0.200 ppm | |
| 2016-07-13 | 1.10 ppm | |
| 2016-07-13 | 0.800 ppm | |
| 2016-07-13 | ND | |
| 2016-07-13 | 0.900 ppm | |
| 2016-07-13 | 1.90 ppm | |
| 2016-07-14 | 2.10 ppm | |
| 2016-07-14 | 0.400 ppm | |
| 2016-07-14 | ND | |
| 2016-07-14 | 0.200 ppm | |
| 2016-07-14 | 0.700 ppm | |
| 2016-07-14 | 0.300 ppm | |
| 2016-07-14 | ND | |
| 2016-07-14 | ND | |
| 2016-07-14 | 0.400 ppm | |
| 2017-07-11 | ND | |
| 2017-07-11 | 2.00 ppm | |
| 2017-07-11 | 0.500 ppm | |
| 2017-07-11 | 1.20 ppm | |
| 2017-07-11 | 0.900 ppm | |
| 2017-07-11 | 1.20 ppm | |
| 2017-07-11 | 1.10 ppm | |
| 2017-07-11 | 0.500 ppm | |
| 2017-07-11 | ND | |
| 2017-07-11 | 1.90 ppm | |
| 2017-07-11 | 0.300 ppm | |
| 2017-07-11 | ND | |
| 2017-07-11 | 0.800 ppm | |
| 2017-07-11 | 0.900 ppm | |
| 2017-07-11 | 0.800 ppm | |
| 2017-07-12 | 0.400 ppm | |
| 2017-07-12 | 0.300 ppm | |
| 2017-07-12 | 1.80 ppm | |
| 2017-07-12 | 0.400 ppm | |
| 2017-07-19 | ND | |
| 2017-08-18 | 2.20 ppm | |
| 2017-08-18 | ND | |
| 2018-03-22 | 1.80 ppm | |
| 2018-07-23 | 0.470 ppm | |
| 2018-07-23 | 0.570 ppm | |
| 2018-07-23 | 0.760 ppm | |
| 2018-07-23 | 1.60 ppm | |
| 2018-07-23 | 1.04 ppm | |
| 2018-07-23 | 0.990 ppm | |
| 2018-07-23 | 0.650 ppm | |
| 2018-07-23 | 0.860 ppm | |
| 2018-07-23 | 0.580 ppm | |
| 2018-07-24 | 0.430 ppm | |
| 2018-07-24 | 0.420 ppm | |
| 2018-07-24 | 0.230 ppm | |
| 2018-07-24 | 1.27 ppm | |
| 2018-07-24 | 0.240 ppm | |
| 2018-07-24 | ND | |
| 2018-07-24 | 0.800 ppm | |
| 2018-07-30 | 1.76 ppm | |
| 2018-07-30 | 0.220 ppm | |
| 2018-07-30 | 1.60 ppm | |
| 2018-07-30 | 1.85 ppm | |
| 2018-07-30 | ND | |
| 2018-10-29 | 0.390 ppm | |
| 2019-07-03 | 0.470 ppm | |
| 2019-07-03 | 0.290 ppm | |
| 2019-07-03 | ND | |
| 2019-07-03 | 0.790 ppm | |
| 2019-07-03 | 0.510 ppm | |
| 2019-07-03 | 0.930 ppm | |
| 2019-07-03 | ND | |
| 2019-07-09 | 0.360 ppm | |
| 2019-07-09 | 0.690 ppm | |
| 2019-07-09 | 1.90 ppm | |
| 2019-07-09 | 1.24 ppm | |
| 2019-07-09 | 1.53 ppm | |
| 2019-07-09 | 0.900 ppm | |
| 2019-07-09 | 0.850 ppm | |
| 2019-07-09 | 0.460 ppm | |
| 2019-07-17 | 0.240 ppm | |
| 2019-07-17 | 1.77 ppm | |
| 2019-07-17 | ND | |
| 2019-08-26 | ND | |
| 2019-08-26 | ND |