Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Nitrate and nitrite

Soquel Creek Water District

Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

 

81

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.0333 ppm91ND - 0.300 ppm
20150.557 ppm143ND - 3.30 ppm
20160.821 ppm145ND - 3.80 ppm
20170.870 ppm208ND - 4.70 ppm
20180.258 ppm122ND - 1.80 ppm
20190.292 ppm123ND - 2.00 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.

EPA Maximum Contaminant
Level (MCL) 10 ppm

ppm = parts per million

All test results

Date Lab ID Result
2014-08-132385-003-09300.300 ppm
2014-10-141644-047-0917ND
2014-10-151644-034-0913ND
2014-10-151644-007-1440ND
2014-10-151644-002-0903ND
2014-10-161644-037-1122ND
2014-10-161644-022-1055ND
2014-10-161644-012-1330ND
2014-12-031644-054-1055ND
2015-02-125806-054-0911ND
2015-09-211644-004-09353.30 ppm
2015-09-221644-003-1505ND
2015-09-221644-049-1433ND
2015-09-221644-005-14073.10 ppm
2015-10-151644-037-1220ND
2015-10-151644-047-1440ND
2015-10-191644-014-1342ND
2015-10-201644-054-1140ND
2015-10-211644-002-1330ND
2015-10-211644-034-1355ND
2015-10-271644-007-0947ND
2015-10-271644-012-0919ND
2015-11-051644-036-13401.40 ppm
2016-09-191644-049-1105ND
2016-09-201644-053-11582.30 ppm
2016-09-201644-052-11501.70 ppm
2016-09-201644-005-08482.10 ppm
2016-09-201644-004-08283.80 ppm
2016-09-201644-036-09021.60 ppm
2016-10-181644-007-1120ND
2016-10-181644-037-1230ND
2016-10-191644-022-1323ND
2016-10-191644-012-1004ND
2016-10-201644-047-1428ND
2016-10-201644-014-0920ND
2016-10-261644-034-1305ND
2016-10-271644-054-1041ND
2017-01-261644-005-11482.00 ppm
2017-01-261644-058-12372.00 ppm
2017-02-021644-005-09401.90 ppm
2017-02-021644-058-10191.90 ppm
2017-02-161644-013-1450ND
2017-05-161644-013-1425ND
2017-08-221644-004-10504.70 ppm
2017-09-131644-036-14071.40 ppm
2017-09-131644-005-12341.90 ppm
2017-09-191644-053-10491.60 ppm
2017-09-191644-049-1109ND
2017-10-031644-054-1340ND
2017-10-041644-037-1155ND
2017-10-051644-047-1102ND
2017-10-051644-034-1207ND
2017-10-101644-022-1311ND
2017-10-121644-014-1335ND
2017-10-121644-012-0733ND
2017-10-241644-013-1106ND
2017-10-241644-007-1033ND
2018-09-041644-054-1127ND
2018-09-195810-005-09441.80 ppm
2018-09-195810-036-09291.30 ppm
2018-09-195810-049-1433ND
2018-10-155810-034-1008ND
2018-10-165810-012-0903ND
2018-10-165810-007-1002ND
2018-10-165810-013-0846ND
2018-10-165810-037-1102ND
2018-10-175810-022-1205ND
2018-10-175810-047-1234ND
2018-10-175810-014-1355ND
2019-09-242385-049-0928ND
2019-09-252385-036-08551.40 ppm
2019-09-252385-005-08322.00 ppm
2019-10-152385-047-0845ND
2019-10-152385-022-1040ND
2019-10-152385-013-1315ND
2019-10-162385-037-0915ND
2019-10-212385-014-1010ND
2019-10-232385-034-1050ND
2019-10-232385-007-11250.1000 ppm
2019-10-232385-012-1005ND
2019-12-305810-059-1137ND