Nitrate and nitrite
Waterbury 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.
28
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.0251 ppm | 7 | 7 | 0.00500 ppm - 0.0920 ppm |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | 0.0169 ppm | 7 | 7 | 0.00800 ppm - 0.0240 ppm |
| 2017 | 0.00257 ppm | 7 | 3 | ND - 0.0140 ppm |
| 2018 | 0.0623 ppm | 7 | 7 | 0.0500 ppm - 0.0710 ppm |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2014-09-25 | RWA200405008NOX | 0.0920 ppm |
| 2014-10-07 | RWA200405696IOCR | 0.0250 ppm |
| 2014-10-07 | RWA200405696NOX | 0.0250 ppm |
| 2014-10-07 | RWA200405697IOCR | 0.0120 ppm |
| 2014-10-07 | RWA200405697NOX | 0.0120 ppm |
| 2014-10-07 | RWA200405698IOCR | 0.00500 ppm |
| 2014-10-07 | RWA200405698NOX | 0.00500 ppm |
| 2016-10-13 | RWA200452354IOCR | 0.0160 ppm |
| 2016-10-13 | RWA200452354NOX | 0.0160 ppm |
| 2016-10-24 | RWA200453063NOX | 0.0220 ppm |
| 2016-10-24 | RWA200453060NOX | 0.0240 ppm |
| 2016-10-24 | RWA200453060IOCR | 0.0240 ppm |
| 2016-10-24 | RWA200453055IOCR | 0.00800 ppm |
| 2016-10-24 | RWA200453055NOX | 0.00800 ppm |
| 2017-09-27 | 200478156NOX | 0.0140 ppm |
| 2017-09-27 | 200478153IOCR | ND |
| 2017-09-27 | 200478153NOX | ND |
| 2017-09-27 | 200478150NOX | ND |
| 2017-09-27 | 200478150IOCR | ND |
| 2017-09-27 | 200478147IOCR | 0.00200 ppm |
| 2017-09-27 | 200478147NOX | 0.00200 ppm |
| 2018-10-17 | RWA200509564NOX | 0.0500 ppm |
| 2018-10-17 | RWA200509564IOCR | 0.0500 ppm |
| 2018-10-17 | RWA200509566IOCR | 0.0660 ppm |
| 2018-10-17 | RWA200509566NOX | 0.0660 ppm |
| 2018-10-17 | RWA200509568NOX | 0.0710 ppm |
| 2018-10-17 | RWA200509568IOCR | 0.0710 ppm |
| 2018-10-18 | RWA200509712NOX | 0.0620 ppm |