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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Sands Point

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

 

228

Samples

0

Samples exceeding legal limit (MCL)

143

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20142.45 ppm53ND - 5.66 ppm
20155.12 ppm115.12 ppm
20162.09 ppm179ND - 5.90 ppm
20172.68 ppm6844ND - 9.60 ppm
20182.62 ppm7044ND - 7.10 ppm
20192.99 ppm6747ND - 7.00 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
2014-11-181411C18-003-PRIND
2014-11-181411C18-004-PRI4.68 ppm
2014-11-181411C18-002-PRI1.89 ppm
2014-11-181411C18-005-PRIND
2014-11-181411C18-001-PRI5.66 ppm
2015-10-201510F76-0015.12 ppm
2016-09-151609D36-001-PRIND
2016-11-16704726005-PRIND
2016-11-21705099005ND
2016-11-217050990021.80 ppm
2016-11-21705099006ND
2016-11-217050990015.50 ppm
2016-11-217050990044.10 ppm
2016-11-217050990031.10 ppm
2016-12-01705820001-POCS5.90 ppm
2016-12-0175820005-PRIND
2016-12-20707350035.50 ppm
2016-12-202902852ND
2016-12-207073530014.20 ppm
2016-12-207073530022.00 ppm
2016-12-207073530035.50 ppm
2016-12-20707353005ND
2016-12-20707353004ND
2017-02-2870122720024.40 ppm
2017-02-287012272004ND
2017-02-2870122720035.20 ppm
2017-02-287012272005ND
2017-02-2870122720015.70 ppm
2017-03-217013839001-PRIND
2017-03-287014322004ND
2017-03-287014322005ND
2017-03-287014322001-POCS6.00 ppm
2017-03-2870143220035.40 ppm
2017-03-287014322002A4.40 ppm
2017-05-117018457003-PRI0.00520 ppm
2017-05-117018457003-POCS5.20 ppm
2017-05-187019036001-PRIND
2017-05-2370193440015.90 ppm
2017-05-2370193440044.90 ppm
2017-05-237019344005ND
2017-05-237019344006ND
2017-05-2370193440023.80 ppm
2017-05-2370193440034.80 ppm
2017-06-2770225410032.30 ppm
2017-06-2770225410015.30 ppm
2017-06-2770225410023.70 ppm
2017-06-2770225410044.70 ppm
2017-06-277022541006ND
2017-06-277022541005ND
2017-07-2570251910034.60 ppm
2017-07-2570251910045.00 ppm
2017-07-2570251910015.30 ppm
2017-07-2570251910023.50 ppm
2017-07-257025191005ND
2017-07-257025191006ND
2017-08-2170277820046.00 ppm
2017-08-217027782006ND
2017-08-2170277820016.00 ppm
2017-08-2170277820023.40 ppm
2017-08-2170277820033.50 ppm
2017-08-217027782005ND
2017-09-25703950001-POCS5.70 ppm
2017-09-252902852-POCS6.30 ppm
2017-09-257030950005ND
2017-09-257030950002-POCS0.000750 ppm
2017-09-257030950003-POCS2.80 ppm
2017-09-257030950001-POCS5.70 ppm
2017-09-257030950006-POCSND
2017-09-257030950004-POCS6.30 ppm
2017-10-2470338660030.130 ppm
2017-10-2470338660022.00 ppm
2017-10-247033866005ND
2017-10-247033866006ND
2017-10-2470338660015.30 ppm
2017-10-2470338660044.80 ppm
2017-11-147035726005-POCSND
2017-11-147035726001-PRI5.00 ppm
2017-11-147035726003-POCS0.180 ppm
2017-11-147035726006-POCSND
2017-11-147035726002-POCS2.00 ppm
2017-11-147035726001-POCS5.00 ppm
2017-11-2870366480024.40 ppm
2017-11-287036648004ND
2017-11-287036648005ND
2017-11-2870366480019.60 ppm
2017-11-2870366480030.710 ppm
2017-12-2670390760031.20 ppm
2017-12-267039076005ND
2017-12-2670390760022.20 ppm
2017-12-2670390760014.00 ppm
2017-12-267039076004ND
2018-01-227040994005ND
2018-01-227040994004ND
2018-01-2270409940022.20 ppm
2018-01-2270409940031.30 ppm
2018-01-2270409940015.40 ppm
2018-02-2070434170014.70 ppm
2018-02-2070434170045.60 ppm
2018-02-2070434170022.50 ppm
2018-02-207043417006ND
2018-02-207043417005ND
2018-02-2070434170032.50 ppm
2018-03-2770463750014.10 ppm
2018-03-2770463750032.90 ppm
2018-03-277046375005ND
2018-03-2770463750060.0880 ppm
2018-03-2770463750045.70 ppm
2018-03-2770463750023.00 ppm
2018-04-247049410006ND
2018-04-2470494100025.90 ppm
2018-04-2470494100033.70 ppm
2018-04-2470494100045.40 ppm
2018-04-247049410005ND
2018-04-2470494100014.50 ppm
2018-05-2270524630042.50 ppm
2018-05-2270524630025.00 ppm
2018-05-2270524630015.20 ppm
2018-05-227052463006ND
2018-05-2270524630033.10 ppm
2018-05-227052463005ND
2018-06-1970554840015.90 ppm
2018-06-1970554840033.70 ppm
2018-06-197055484004-GE6.00 ppm
2018-06-197055484006ND
2018-06-197055484005ND
2018-06-1970554840025.00 ppm
2018-07-1770585280047.10 ppm
2018-07-1770585280016.30 ppm
2018-07-177058528005ND
2018-07-1770585280026.70 ppm
2018-07-1770585280034.30 ppm
2018-07-177058528006ND
2018-08-2170622920015.80 ppm
2018-08-2170622920025.80 ppm
2018-08-2170622920033.20 ppm
2018-08-217062292005ND
2018-08-2170622920043.70 ppm
2018-08-217062292006ND
2018-09-187065159005-POCSND
2018-09-187065159006-POCSND
2018-09-187065159001-POCSND
2018-09-187065159004-POCS4.90 ppm
2018-09-187065159003-POCS2.50 ppm
2018-09-187065159002-POCS2.90 ppm
2018-10-167068145001-SEC5.00 ppm
2018-10-167068145006-SECND
2018-10-167068145002-PRI5.00 ppm
2018-11-067070185004-PRIND
2018-11-067070185002-SECND
2018-11-197071538005ND
2018-11-197071538006ND
2018-11-1970715380034.50 ppm
2018-11-1970715380023.40 ppm
2018-11-1970715380042.60 ppm
2018-11-197071538007ND
2018-12-1870742630040.410 ppm
2018-12-187074263005ND
2018-12-1870742630025.80 ppm
2018-12-1870742630015.00 ppm
2018-12-1870742630032.70 ppm
2018-12-187074263006ND
2019-01-157076656005ND
2019-01-1570766560024.70 ppm
2019-01-1570766560014.30 ppm
2019-01-1570766560032.40 ppm
2019-01-157076656006ND
2019-01-1570766560043.10 ppm
2019-02-2070801490050.0600 ppm
2019-02-2070801490014.20 ppm
2019-02-2070801490033.40 ppm
2019-02-2070801490024.10 ppm
2019-02-2070801490060.900 ppm
2019-02-2070801490043.50 ppm
2019-03-1970828460027.00 ppm
2019-03-1970828460055.30 ppm
2019-03-197082846007ND
2019-03-197082846006ND
2019-03-1970828460036.40 ppm
2019-03-1970828460043.70 ppm
2019-04-167086046007ND
2019-04-167086046006ND
2019-04-1670860460043.90 ppm
2019-04-1670860460054.50 ppm
2019-04-1670860460035.40 ppm
2019-04-1670860460024.50 ppm
2019-05-217090320005ND
2019-05-2170903200045.00 ppm
2019-05-2170903200014.00 ppm
2019-05-2170903200033.70 ppm
2019-05-2170903200025.50 ppm
2019-05-217090320006ND
2019-06-187094090005ND
2019-06-1870940900024.90 ppm
2019-06-1870940900015.70 ppm
2019-06-1870940900032.90 ppm
2019-06-187094090006ND
2019-06-1870940900044.00 ppm
2019-07-1670976820035.30 ppm
2019-07-1670976820043.50 ppm
2019-07-167097682007ND
2019-07-167097682006ND
2019-07-1670976820025.80 ppm
2019-07-1670976820053.90 ppm
2019-08-20701020900027.00 ppm
2019-08-2070102090006ND
2019-08-20701020900033.40 ppm
2019-08-20701020900015.60 ppm
2019-08-20701020900046.00 ppm
2019-08-2070102090005ND
2019-09-1770105251002-POCS2.80 ppm
2019-09-1770105251001-POCS5.70 ppm
2019-09-1770105251006ND
2019-09-17701052510044.60 ppm
2019-09-1770105251003-POCS2.80 ppm
2019-09-1770105251005ND
2019-10-15701084880015.70 ppm
2019-11-1970112367005ND
2019-11-1970112367006ND
2019-11-19701123670041.20 ppm
2019-11-19701123670015.90 ppm
2019-11-19701123670025.40 ppm
2019-11-19701123670032.40 ppm
2019-12-17701156760043.90 ppm
2019-12-17701156760014.90 ppm
2019-12-17701156760032.70 ppm
2019-12-1770115676006ND
2019-12-1770115676005ND
2019-12-17701156760025.10 ppm