Nitrate
New London Village -plant 2
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.128 ppm | 12 | 7 | ND - 0.390 ppm |
| 2015 | 0.170 ppm | 12 | 6 | ND - 0.480 ppm |
| 2016 | 0.210 ppm | 12 | 7 | ND - 0.540 ppm |
| 2017 | 0.413 ppm | 12 | 10 | ND - 0.760 ppm |
| 2018 | 0.248 ppm | 12 | 5 | ND - 0.710 ppm |
| 2019 | ND | 10 | 0 | ND |
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 |
|---|---|---|
| 2014-01-08 | A140165260 | 0.390 ppm |
| 2014-02-12 | A140158984 | 0.270 ppm |
| 2014-03-12 | A140183144 | 0.210 ppm |
| 2014-04-09 | A140186918 | 0.190 ppm |
| 2014-05-14 | A140165289 | 0.220 ppm |
| 2014-06-11 | A140186962 | 0.140 ppm |
| 2014-07-09 | A140204966 | 0.110 ppm |
| 2014-08-13 | A140223356 | ND |
| 2014-09-10 | A140235842 | ND |
| 2014-10-08 | A140242118 | ND |
| 2014-11-12 | A140243047 | ND |
| 2014-12-10 | A140255130 | ND |
| 2015-01-14 | A150255480 | ND |
| 2015-02-11 | A150270128 | 0.370 ppm |
| 2015-03-11 | A150052310 | 0.480 ppm |
| 2015-04-08 | A150282499 | 0.400 ppm |
| 2015-05-13 | A150277941 | 0.320 ppm |
| 2015-06-10 | A150294158 | 0.230 ppm |
| 2015-07-08 | A150303634 | 0.240 ppm |
| 2015-08-12 | A150318813 | ND |
| 2015-09-09 | A150322394 | ND |
| 2015-10-14 | A150206869 | ND |
| 2015-11-11 | A150342778 | ND |
| 2015-12-09 | A150334872 | ND |
| 2016-01-13 | A160331152 | 0.330 ppm |
| 2016-02-10 | A160259293 | 0.540 ppm |
| 2016-03-09 | A160363534 | 0.460 ppm |
| 2016-04-13 | A160376977 | 0.380 ppm |
| 2016-05-11 | A160357518 | 0.340 ppm |
| 2016-06-08 | A160403760 | 0.330 ppm |
| 2016-07-13 | A160409740 | 0.140 ppm |
| 2016-08-10 | A160407601 | ND |
| 2016-09-14 | A160392033 | ND |
| 2016-10-12 | A160443880 | ND |
| 2016-11-09 | A160444606 | ND |
| 2016-12-14 | A160453091 | ND |
| 2017-01-11 | A170460882 | 0.650 ppm |
| 2017-02-08 | A170467694 | 0.760 ppm |
| 2017-03-08 | A170476213 | 0.750 ppm |
| 2017-04-12 | A170360862 | 0.700 ppm |
| 2017-05-10 | A170490375 | 0.660 ppm |
| 2017-06-14 | A170476275 | 0.400 ppm |
| 2017-07-12 | A170514856 | 0.420 ppm |
| 2017-08-09 | A170516114 | 0.210 ppm |
| 2017-09-20 | A170528099 | 0.120 ppm |
| 2017-10-11 | A170358072 | ND |
| 2017-11-08 | A170547749 | ND |
| 2017-12-13 | A170557318 | 0.280 ppm |
| 2018-01-10 | A180560634 | 0.380 ppm |
| 2018-02-14 | A180570079 | 0.680 ppm |
| 2018-03-14 | A180574883 | 0.710 ppm |
| 2018-04-11 | A180585024 | 0.650 ppm |
| 2018-05-09 | A180589391 | 0.550 ppm |
| 2018-06-13 | A180601006 | ND |
| 2018-07-11 | A180614450 | ND |
| 2018-08-08 | A180622912 | ND |
| 2018-09-12 | A180631083 | ND |
| 2018-10-10 | A180636352 | ND |
| 2018-11-14 | 8K01698-01 | ND |
| 2018-12-12 | 8L01507-03 | ND |
| 2019-01-09 | 9A01318-02 | ND |
| 2019-02-13 | 9B01437-01 | ND |
| 2019-03-13 | 9C01582-03 | ND |
| 2019-04-10 | 9D01432-01 | ND |
| 2019-05-08 | 9E01293-01 | ND |
| 2019-06-12 | 9F01758-01 | ND |
| 2019-07-10 | 9G01767-01 | ND |
| 2019-08-14 | 9H02411-01 | ND |
| 2019-09-11 | 9I01707-01 | ND |
| 2019-10-09 | 9J01434-04 | ND |