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EWG's Tap Water Database — 2019 UPDATE

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Nitrate and nitrite

City of Santa Barbara Water Department

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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

29

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.04 ppm87ND - 5.90 ppm
20130.567 ppm31ND - 1.70 ppm
20141.75 ppm43ND - 5.50 ppm
20152.77 ppm117ND - 6.87 ppm
20161.98 ppm86ND - 5.90 ppm
20172.64 ppm75ND - 7.10 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
2012-07-179590-004-1056ND
2012-07-189590-005-09230.750 ppm
2012-07-189590-042-12030.990 ppm
2012-07-189590-042-11481.000 ppm
2012-07-189590-015-10310.900 ppm
2012-07-189590-015-10530.890 ppm
2012-12-119590-035-11085.90 ppm
2012-12-119590-035-10185.90 ppm
2013-04-299590-053-09471.70 ppm
2013-08-189590-031-1605ND
2013-10-159590-004-0835ND
2014-10-219590-015-08430.580 ppm
2014-10-219590-035-09315.50 ppm
2014-10-219590-042-07580.920 ppm
2014-10-229590-004-1014ND
2015-04-083774-035-09356.47 ppm
2015-07-073774-035-08376.87 ppm
2015-09-099590-055-1515ND
2015-10-209590-035-09565.80 ppm
2015-10-219590-054-1002ND
2015-10-219590-004-0947ND
2015-11-109590-005-10502.50 ppm
2015-11-109590-035-10066.00 ppm
2015-11-109590-031-1107ND
2015-11-109590-053-10401.80 ppm
2015-11-109590-042-09201.000 ppm
2016-05-103774-015-13310.390 ppm
2016-07-133774-035-09304.76 ppm
2016-11-029590-031-1120ND
2016-11-029590-005-10592.40 ppm
2016-11-029590-053-11521.40 ppm
2016-11-029590-035-09165.90 ppm
2016-11-029590-004-0838ND
2016-11-029590-042-10150.980 ppm
2017-05-189590-058-1734ND
2017-11-079590-004-0955ND
2017-11-089590-053-09391.40 ppm
2017-11-149590-035-09307.00 ppm
2017-11-149590-042-08481.50 ppm
2017-11-289590-035-09287.10 ppm
2017-11-289590-042-09581.50 ppm