Nitrate
Port Washington WD
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 | 4.58 ppm | 32 | 32 | 0.430 ppm - 6.13 ppm |
2015 | 4.53 ppm | 46 | 46 | 0.400 ppm - 5.94 ppm |
2016 | 4.06 ppm | 51 | 50 | ND - 5.87 ppm |
2017 | 4.03 ppm | 48 | 47 | ND - 7.20 ppm |
2018 | 3.87 ppm | 48 | 47 | ND - 6.00 ppm |
2019 | 3.89 ppm | 47 | 46 | ND - 6.40 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 |
---|---|---|
2014-01-06 | 1401093-002-POCS | 6.13 ppm |
2014-01-06 | 1401093-010-POCS | 3.37 ppm |
2014-01-06 | 1401093-003 | 5.44 ppm |
2014-01-06 | 1401093-008-POCS | 5.61 ppm |
2014-02-04 | 1402074-002-POCS | 4.74 ppm |
2014-03-03 | 1403083-002-POCS | 4.88 ppm |
2014-04-07 | 1404520-003-PRI | 4.02 ppm |
2014-04-07 | 1404520-008-PRI | 3.85 ppm |
2014-04-07 | 1404520-001-PRI | 4.16 ppm |
2014-04-07 | 1404520-005-PRI | 0.430 ppm |
2014-04-07 | 1404520-006-PRI | 5.64 ppm |
2014-04-14 | 1404A14-008-PRI | 4.60 ppm |
2014-04-14 | 1404A14-004-PRI | 3.70 ppm |
2014-04-14 | 1404A14-007-PRI | 3.17 ppm |
2014-05-05 | 1405252-002A | 5.07 ppm |
2014-05-05 | 1405252-003A | 3.91 ppm |
2014-07-07 | 407363-006-POCS | 4.15 ppm |
2014-07-07 | 1407363-008-POCS | 5.50 ppm |
2014-07-14 | 1407941-010 | 5.49 ppm |
2014-07-14 | 1407941-006-POCS | 3.47 ppm |
2014-09-30 | 1409M68-003A | 5.10 ppm |
2014-09-30 | 1409M68-002A | 5.47 ppm |
2014-10-06 | 1410355-003A | 3.69 ppm |
2014-10-06 | 1410355-001A | 4.66 ppm |
2014-10-06 | 1410355-006A | 5.22 ppm |
2014-10-06 | 1410355-007A | 4.83 ppm |
2014-10-14 | 1410974-002A | 5.62 ppm |
2014-10-31 | 1410K73-001-POCS | 5.51 ppm |
2014-11-03 | 1411081-002A | 4.77 ppm |
2014-11-03 | 1411081-003A | 4.74 ppm |
2014-12-01 | 1412059-002A | 5.13 ppm |
2014-12-01 | 1412059-003A | 4.54 ppm |
2015-01-05 | 1501129-005A | 5.05 ppm |
2015-01-05 | 1501129-004A | 4.00 ppm |
2015-01-05 | 1501129-001A | 3.66 ppm |
2015-01-12 | 1501609-003A | 5.39 ppm |
2015-01-12 | 1501609-002A | 5.39 ppm |
2015-02-03 | 1502148-002A | 5.59 ppm |
2015-02-03 | 1502147-001-POCS | 5.82 ppm |
2015-02-03 | 1502148-003A | 5.71 ppm |
2015-03-02 | 1503070-001-POCS | 4.89 ppm |
2015-04-06 | 1504353-006-PRI | 5.81 ppm |
2015-04-06 | 1504351-002-PRI | 3.86 ppm |
2015-04-06 | 1504351-003-PRI | 5.92 ppm |
2015-04-06 | 1504351-001-PRI | 4.49 ppm |
2015-04-13 | 1504912-001-PRI | 0.510 ppm |
2015-04-13 | 1504912-006-PRI | 3.58 ppm |
2015-04-13 | 1504912-005-PRI | 4.21 ppm |
2015-04-22 | 1504H15-002-PRI | 4.31 ppm |
2015-04-22 | 1504H16-003A | 4.02 ppm |
2015-04-22 | 1504H16-002A | 4.35 ppm |
2015-05-04 | 1505211-003A | 5.45 ppm |
2015-05-04 | 1505211-002A | 4.97 ppm |
2015-05-04 | 1505209-007-POCS | 5.82 ppm |
2015-06-01 | 1506095-001-POCS | 5.93 ppm |
2015-06-01 | 1506096-003A | 0.400 ppm |
2015-06-01 | 1506096-002A | 4.54 ppm |
2015-07-06 | 1507287-003A | 4.77 ppm |
2015-07-06 | 1507287-001A | 5.94 ppm |
2015-07-06 | 1507287-006A | 4.41 ppm |
2015-07-06 | 1507287-005A | 4.49 ppm |
2015-07-13 | 1507A51-001A | 5.50 ppm |
2015-07-13 | 1507819-002A | 4.34 ppm |
2015-07-20 | 1507D89-002-POCS | 5.49 ppm |
2015-08-03 | 1508065-006-POCS | 4.14 ppm |
2015-08-03 | 1508065-008 | 4.55 ppm |
2015-09-08 | 1509496-001-POCS | 1.20 ppm |
2015-09-14 | 1509974-002A | 4.59 ppm |
2015-09-14 | 1509974-003A | 4.89 ppm |
2015-10-13 | 1510941-002A | 3.39 ppm |
2015-10-13 | 1510934-002A | 3.68 ppm |
2015-10-13 | 1510934-003A | 3.99 ppm |
2015-11-02 | 1511049-001-POCS | 5.35 ppm |
2015-11-09 | 1511653-002A | 5.49 ppm |
2015-11-09 | 1511653-003A | 5.17 ppm |
2015-12-07 | 1512502-001-POCS | 5.04 ppm |
2015-12-14 | 1512B74-002A | 4.21 ppm |
2015-12-14 | 1512B74-003A | 4.15 ppm |
2016-01-04 | 1601045-002-POCS | 5.27 ppm |
2016-01-04 | 1601043-002-POCS | 3.33 ppm |
2016-01-11 | 1601564-003A | 5.04 ppm |
2016-01-11 | 1601581-001-POCS | 5.65 ppm |
2016-01-11 | 1601564-002C | 5.12 ppm |
2016-02-01 | 1602082-001-POCS | 5.17 ppm |
2016-02-08 | 1602676-003A | 4.85 ppm |
2016-02-08 | 1602676-002A | 5.87 ppm |
2016-03-07 | 1603505-001A | 4.59 ppm |
2016-03-07 | 1603505-002A | 4.82 ppm |
2016-03-14 | 1603B14-001-POCS | 4.90 ppm |
2016-03-23 | 1603I51-001A | 0.340 ppm |
2016-04-04 | 1604285-002-POCS | 3.96 ppm |
2016-04-04 | 1604282-002-PRI | 5.84 ppm |
2016-04-04 | 1604285-002-PRI | 3.96 ppm |
2016-04-04 | 1604281-002-PRI | 3.30 ppm |
2016-04-11 | 1604990-002-PRI | 4.87 ppm |
2016-04-11 | 1604985-002A | 4.82 ppm |
2016-04-11 | 1604985-003A | 4.97 ppm |
2016-04-11 | 1604997-002-PRI | 3.91 ppm |
2016-05-02 | 1605093-002-PRI | 0.460 ppm |
2016-05-02 | 1605104-001-PRI | 3.93 ppm |
2016-05-09 | 1605753-001-PRI | 5.44 ppm |
2016-05-23 | 1605L28-001-PRI | 0.00222 ppm |
2016-05-31 | 1605S37-002A | 3.62 ppm |
2016-06-13 | 1606C69-003A | 5.45 ppm |
2016-06-13 | 1606C69-002A | 4.13 ppm |
2016-07-05 | 1607801-002-POCS | 3.58 ppm |
2016-07-05 | 1607187-001-POCS | 4.09 ppm |
2016-07-11 | 1607809-002A | 4.42 ppm |
2016-07-11 | 1607809-003A | 5.20 ppm |
2016-07-18 | 1607D93-004-POCS | 5.60 ppm |
2016-08-08 | 1608842-001-POCS | 1.61 ppm |
2016-08-08 | 1608842-002-POCS | ND |
2016-08-15 | 1608E15-001-POCS | 5.29 ppm |
2016-08-29 | 1608Q09-003A | 3.58 ppm |
2016-08-29 | 1608Q09-002A | 3.57 ppm |
2016-09-06 | 1609251-003A | 4.52 ppm |
2016-09-06 | 1609251-002A | 4.93 ppm |
2016-10-03 | 701055015-POCS | 3.70 ppm |
2016-10-03 | 701055017 | 3.70 ppm |
2016-10-03 | 701055018 | 4.40 ppm |
2016-10-12 | 701870001-POCS | 5.20 ppm |
2016-10-12 | 701866001-POCS | 3.30 ppm |
2016-11-07 | 703912002 | 4.90 ppm |
2016-11-07 | 703912003 | 5.00 ppm |
2016-11-14 | 704466002-POCS | 1.60 ppm |
2016-11-14 | 704466001 | 0.320 ppm |
2016-11-14 | 704466003-POCS | 5.20 ppm |
2016-12-05 | 706016001-POCS | 4.90 ppm |
2016-12-05 | 706016002 | 4.80 ppm |
2017-01-09 | 708614004 | 5.40 ppm |
2017-01-09 | 708614005 | 5.50 ppm |
2017-01-17 | 709252008-POCS | 2.90 ppm |
2017-01-30 | 7010124001-POCS | 5.40 ppm |
2017-02-06 | 7010655006-POCS | 2.00 ppm |
2017-02-06 | 7010655007-POCS | 0.400 ppm |
2017-02-13 | 701183001-POCS | 5.20 ppm |
2017-02-13 | 7011187003 | 4.30 ppm |
2017-02-13 | 7011187002 | 5.20 ppm |
2017-03-06 | 7012712007 | 4.20 ppm |
2017-03-06 | 7012712008 | 4.60 ppm |
2017-04-03 | 7014743009 | 5.20 ppm |
2017-04-03 | 7014743006-PRI | 5.60 ppm |
2017-04-03 | 7014743008 | 4.60 ppm |
2017-04-03 | 7014743005-PRI | 3.50 ppm |
2017-04-03 | 7014743004-PRI | 5.20 ppm |
2017-04-10 | 7015386002-PRI | 4.30 ppm |
2017-04-13 | 7015766001-PRI | 3.70 ppm |
2017-05-01 | 7017344001-PRI | 4.80 ppm |
2017-05-01 | 7017344002-PRI | 6.20 ppm |
2017-05-08 | 7018068001-PRI | 0.380 ppm |
2017-05-08 | 7018068002-PRI | 0.00190 ppm |
2017-05-30 | 7019827003 | 4.40 ppm |
2017-05-30 | 7019827002 | 5.60 ppm |
2017-06-12 | 7021104009 | 4.80 ppm |
2017-06-12 | 7021104008 | 3.50 ppm |
2017-07-03 | 7023076005 | 3.20 ppm |
2017-07-03 | 7023076004 | 3.70 ppm |
2017-07-10 | 2912267 | 4.70 ppm |
2017-07-10 | 7023605005-POCS | 5.00 ppm |
2017-07-10 | 7023605008 | 4.90 ppm |
2017-08-07 | 7026415004 | 5.30 ppm |
2017-08-07 | 7026415006 | 0.260 ppm |
2017-08-07 | 7026415002 | 7.20 ppm |
2017-08-07 | 7026415005 | ND |
2017-08-07 | 7026415003 | 4.90 ppm |
2017-09-05 | 7028837003 | 3.80 ppm |
2017-10-02 | 7031575001 | 3.80 ppm |
2017-10-10 | 703400003 | 5.20 ppm |
2017-10-10 | 7032400002 | 5.40 ppm |
2017-10-10 | 7032410002 | 3.40 ppm |
2017-11-06 | 7034946002 | 5.40 ppm |
2017-11-06 | 7034946003 | 4.70 ppm |
2017-11-13 | 7035577001 | 0.260 ppm |
2017-11-13 | 7035576001 | 1.60 ppm |
2017-11-13 | 7035574001 | 4.90 ppm |
2017-12-04 | 7037089003 | 4.40 ppm |
2017-12-04 | 7037089002 | 4.30 ppm |
2018-01-08 | 7039795001 | 5.50 ppm |
2018-01-16 | 7040518002 | 4.50 ppm |
2018-01-16 | 7040518003 | 4.70 ppm |
2018-02-05 | 7042006001 | 0.230 ppm |
2018-02-05 | 7042005001 | 1.40 ppm |
2018-02-05 | 7042003001 | 4.70 ppm |
2018-02-12 | 7042662003 | 5.00 ppm |
2018-02-12 | 7042662002 | 4.70 ppm |
2018-03-12 | 7045062002 | 3.70 ppm |
2018-03-12 | 7045062003 | 4.20 ppm |
2018-04-03 | 7046952001-PRI | 4.70 ppm |
2018-04-03 | 7046947002 | 3.10 ppm |
2018-04-09 | 7047717002 | 4.80 ppm |
2018-04-09 | 7047717003 | 5.40 ppm |
2018-04-09 | 7047715003-PRI | 5.10 ppm |
2018-04-17 | 7048617002-PRI | 5.30 ppm |
2018-05-01 | 7050071001-SEC | 3.80 ppm |
2018-05-01 | 7050068001 | 5.00 ppm |
2018-05-07 | 7050719001 | 1.70 ppm |
2018-05-07 | 7050721002 | 3.70 ppm |
2018-05-07 | 7050721003 | 4.30 ppm |
2018-05-07 | 7050717001 | 0.260 ppm |
2018-06-05 | 7053698002 | 4.70 ppm |
2018-06-05 | 7053698003 | 5.10 ppm |
2018-07-02 | 7056883002 | 5.40 ppm |
2018-07-02 | 7056883003 | 5.20 ppm |
2018-07-10 | 7057562001 | 0.00510 ppm |
2018-08-14 | 7061475002 | 4.90 ppm |
2018-08-14 | 7061475002-NIT | 4.90 ppm |
2018-08-14 | 7061475003 | 5.20 ppm |
2018-08-14 | 7061475012 | ND |
2018-08-14 | 7061475010 | 1.70 ppm |
2018-08-14 | 7061475003-NIT | 5.20 ppm |
2018-08-14 | 7061475007 | 6.00 ppm |
2018-09-10 | 7064199002 | 5.80 ppm |
2018-09-10 | 7064199003 | 5.10 ppm |
2018-10-01 | 7066393011 | 2.70 ppm |
2018-10-09 | 7067296010 | 3.60 ppm |
2018-10-09 | 7067296012 | 5.20 ppm |
2018-10-15 | 7068008002 | 4.00 ppm |
2018-10-15 | 7068008003 | 4.20 ppm |
2018-11-05 | 7070053001 | 3.60 ppm |
2018-11-14 | 7071064002 | 3.50 ppm |
2018-11-14 | 7071059001 | 1.20 ppm |
2018-11-14 | 7071054001 | 0.190 ppm |
2018-11-14 | 7071064001 | 3.70 ppm |
2018-12-17 | 7074163007 | 4.30 ppm |
2018-12-17 | 7074163008 | 4.60 ppm |
2019-01-07 | 7075760002 | 5.80 ppm |
2019-01-14 | 7076494002 | 3.20 ppm |
2019-01-14 | 7076492004 | 5.00 ppm |
2019-01-14 | 7076494003 | 4.10 ppm |
2019-02-04 | 7078267001 | 1.80 ppm |
2019-02-04 | 7078267002 | 0.230 ppm |
2019-02-04 | 7078268002 | 4.20 ppm |
2019-02-04 | 7078268003 | 6.10 ppm |
2019-02-04 | 7078267003 | 5.10 ppm |
2019-04-11 | 7085526009-SEC | 5.20 ppm |
2019-04-11 | 7085526005-SEC | 3.70 ppm |
2019-04-12 | 7085703003 | 5.00 ppm |
2019-04-12 | 7085694008-SEC | 4.10 ppm |
2019-04-12 | 7085703002 | 4.40 ppm |
2019-04-25 | 7087268001-SEC | ND |
2019-05-17 | 7089996001-PRI | 5.40 ppm |
2019-05-20 | 7090159001-PRI | 4.30 ppm |
2019-05-22 | 7090503002-PRI | 0.280 ppm |
2019-05-22 | 7090503001-PRI | 1.50 ppm |
2019-05-22 | 7090504002 | 4.20 ppm |
2019-05-22 | 7090504003 | 4.10 ppm |
2019-06-12 | 7093300003 | 3.90 ppm |
2019-06-12 | 7093300002 | 5.40 ppm |
2019-07-15 | 7097514003 | 3.70 ppm |
2019-07-15 | 7097517002 | 4.90 ppm |
2019-07-15 | 7097517003 | 4.10 ppm |
2019-07-22 | 7098451005 | 2.80 ppm |
2019-07-29 | 7099249002 | 6.30 ppm |
2019-08-05 | 7099944003 | 3.70 ppm |
2019-08-05 | 7099944002 | 5.00 ppm |
2019-08-12 | 70100931002 | 5.70 ppm |
2019-08-20 | 70102057002 | 0.310 ppm |
2019-08-20 | 70102057001 | 1.60 ppm |
2019-09-09 | 70104210002 | 4.60 ppm |
2019-09-09 | 70104210003 | 5.00 ppm |
2019-10-16 | 70108636002 | 6.40 ppm |
2019-10-16 | 70108636003 | 5.00 ppm |
2019-10-16 | 70108637007 | 2.80 ppm |
2019-10-21 | 70109179002 | 6.20 ppm |
2019-10-25 | 70109763003 | 5.40 ppm |
2019-11-04 | 70110557001 | 4.70 ppm |
2019-11-04 | 70110567001 | 1.50 ppm |
2019-11-04 | 70110567002 | 0.120 ppm |
2019-11-12 | 70111554006 | 4.50 ppm |
2019-11-12 | 70111554005 | 4.40 ppm |
2019-12-23 | 70116327003 | 2.40 ppm |
2019-12-23 | 70116327002 | 4.60 ppm |