Nitrate
Cal-water Service Company - Marysville
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 1.43 ppm | 12 | 11 | ND - 2.75 ppm |
2015 | 1.15 ppm | 11 | 10 | ND - 2.36 ppm |
2016 | 1.07 ppm | 10 | 9 | ND - 1.90 ppm |
2017 | 1.03 ppm | 10 | 8 | ND - 1.97 ppm |
2018 | 1.20 ppm | 13 | 12 | ND - 2.63 ppm |
2019 | 1.43 ppm | 10 | 9 | ND - 3.06 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 |
---|---|---|
2014-01-22 | 5701-012-1545 | ND |
2014-01-22 | 5701-011-0931 | 2.75 ppm |
2014-01-22 | 5701-009-1335 | 0.804 ppm |
2014-02-19 | 5701-010-0837 | 0.691 ppm |
2014-02-25 | 5701-016-1331 | 1.02 ppm |
2014-05-19 | 5810-011-1320 | 2.71 ppm |
2014-07-21 | 5701-015-1000 | 1.20 ppm |
2014-07-21 | 5701-011-0905 | 2.54 ppm |
2014-10-14 | 5810-013-1318 | 1.29 ppm |
2014-10-15 | 5701-008-1016 | 0.996 ppm |
2014-10-15 | 5701-011-0832 | 2.20 ppm |
2014-11-17 | 5810-008-1318 | 0.971 ppm |
2015-01-12 | 5810-012-1414 | ND |
2015-01-12 | 5810-009-1329 | 0.768 ppm |
2015-01-20 | 5701-010-0948 | 0.662 ppm |
2015-01-20 | 5701-011-1300 | 2.25 ppm |
2015-01-20 | 5701-015-1036 | 1.14 ppm |
2015-02-25 | 5701-016-1332 | 1.46 ppm |
2015-03-17 | 5701-011-1059 | 2.36 ppm |
2015-04-06 | 5810-010-1310 | 0.678 ppm |
2015-04-28 | 5701-013-1306 | 1.33 ppm |
2015-08-17 | 5701-008-1122 | 1.00 ppm |
2015-08-19 | 5810-015-1053 | 1.000 ppm |
2016-01-20 | 5701-008-1121 | 0.973 ppm |
2016-01-20 | 5701-009-1158 | 1.01 ppm |
2016-02-16 | 5810-016-1429 | 0.710 ppm |
2016-03-07 | 5810-011-1306 | 1.90 ppm |
2016-04-18 | 5701-010-1515 | 0.791 ppm |
2016-04-18 | 5701-013-1251 | 1.60 ppm |
2016-06-22 | 5701-012-1619 | ND |
2016-06-22 | 5701-015-1338 | 1.42 ppm |
2016-08-08 | 5701-015-1410 | 1.35 ppm |
2016-12-20 | 5810-008-1305 | 0.980 ppm |
2017-01-09 | 5701-009-1117 | 0.851 ppm |
2017-01-09 | 5701-008-0831 | 1.26 ppm |
2017-02-27 | 5701-016-1536 | ND |
2017-03-13 | 5701-011-1046 | 1.97 ppm |
2017-03-22 | 5810-013-1401 | 1.10 ppm |
2017-04-24 | 5701-013-1424 | 1.36 ppm |
2017-04-24 | 5701-010-1438 | 0.892 ppm |
2017-06-28 | 5701-012-1310 | ND |
2017-06-28 | 5701-015-1648 | 1.51 ppm |
2017-08-14 | 5701-015-1417 | 1.36 ppm |
2018-01-17 | 5701-008-1332 | 1.18 ppm |
2018-01-17 | 5810-009-1400 | 0.740 ppm |
2018-01-17 | 5701-009-1350 | 0.909 ppm |
2018-02-20 | 5701-016-1106 | 1.48 ppm |
2018-04-16 | 5701-009-1540 | 0.855 ppm |
2018-04-16 | 5701-008-1318 | 1.21 ppm |
2018-04-16 | 5701-013-1304 | 1.36 ppm |
2018-04-17 | 5810-010-1316 | 0.650 ppm |
2018-05-14 | 5701-015-1433 | 1.75 ppm |
2018-05-15 | 5810-012-1433 | ND |
2018-06-11 | 5701-016-1142 | 1.69 ppm |
2018-06-11 | 5701-011-0832 | 2.63 ppm |
2018-08-07 | 5810-015-1355 | 1.10 ppm |
2019-02-13 | 5810-016-1035 | 0.920 ppm |
2019-03-28 | 5810-011-1412 | 2.60 ppm |
2019-04-09 | 2385-009-1450 | 0.800 ppm |
2019-04-09 | 2385-010-1306 | 0.900 ppm |
2019-04-09 | 2385-013-1700 | 1.70 ppm |
2019-05-21 | 5701-015-0838 | 1.48 ppm |
2019-05-21 | 5701-012-1005 | ND |
2019-06-17 | 5701-016-1043 | 1.49 ppm |
2019-06-17 | 5701-011-1021 | 3.06 ppm |
2019-08-12 | 5701-015-1420 | 1.33 ppm |