Nitrate and nitrite
Clyde City
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.
70
Samples
0
Samples exceeding legal limit (MCL)
47
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.189 ppm | 12 | 6 | ND - 0.550 ppm |
| 2015 | 0.202 ppm | 12 | 9 | ND - 0.410 ppm |
| 2016 | 0.379 ppm | 12 | 11 | ND - 0.710 ppm |
| 2017 | 0.324 ppm | 12 | 12 | 0.180 ppm - 0.550 ppm |
| 2018 | 0.291 ppm | 12 | 6 | ND - 0.750 ppm |
| 2019 | 0.267 ppm | 10 | 4 | ND - 0.830 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 |
|---|---|---|
| 2014-01-08 | A140165105 | 0.340 ppm |
| 2014-02-07 | A140165108 | 0.460 ppm |
| 2014-03-05 | A140180139 | 0.490 ppm |
| 2014-04-02 | A140183159 | 0.550 ppm |
| 2014-05-07 | A140180142 | 0.280 ppm |
| 2014-06-04 | A140183417 | ND |
| 2014-07-02 | A140194382 | ND |
| 2014-08-06 | A140202425 | ND |
| 2014-09-03 | A140205195 | ND |
| 2014-10-01 | A140218450 | ND |
| 2014-11-05 | A140224621 | ND |
| 2014-12-03 | A140242449 | 0.150 ppm |
| 2015-01-07 | A150242450 | 0.160 ppm |
| 2015-02-04 | A150255091 | 0.200 ppm |
| 2015-03-04 | A150257808 | 0.320 ppm |
| 2015-04-01 | A150269803 | 0.410 ppm |
| 2015-05-06 | A150274195 | 0.320 ppm |
| 2015-06-03 | A150282189 | 0.270 ppm |
| 2015-07-01 | A150288058 | 0.230 ppm |
| 2015-08-05 | A150292685 | ND |
| 2015-09-02 | A150313709 | ND |
| 2015-10-07 | A150322321 | ND |
| 2015-11-04 | A150323261 | 0.210 ppm |
| 2015-12-02 | A150323264 | 0.300 ppm |
| 2016-01-06 | A160335123 | 0.320 ppm |
| 2016-02-03 | A160345248 | 0.440 ppm |
| 2016-03-02 | A160350316 | 0.620 ppm |
| 2016-04-06 | A160360934 | 0.710 ppm |
| 2016-05-04 | A160368393 | 0.520 ppm |
| 2016-06-01 | A160383178 | 0.410 ppm |
| 2016-07-06 | A160398766 | 0.600 ppm |
| 2016-08-03 | A160407720 | 0.350 ppm |
| 2016-09-07 | A160407724 | ND |
| 2016-10-05 | A160418831 | 0.130 ppm |
| 2016-11-02 | A160197304 | 0.190 ppm |
| 2016-12-07 | A160424065 | 0.260 ppm |
| 2017-01-04 | A170430108 | 0.180 ppm |
| 2017-02-01 | A170430111 | 0.200 ppm |
| 2017-03-01 | A170443762 | 0.270 ppm |
| 2017-04-05 | A170453164 | 0.380 ppm |
| 2017-05-03 | A170462681 | 0.500 ppm |
| 2017-06-07 | A170469253 | 0.340 ppm |
| 2017-07-05 | A170480075 | 0.550 ppm |
| 2017-08-02 | A170480551 | 0.290 ppm |
| 2017-09-06 | A170490340 | 0.200 ppm |
| 2017-10-03 | A170497509 | 0.400 ppm |
| 2017-11-01 | A170527705 | 0.310 ppm |
| 2017-12-12 | A170534671 | 0.270 ppm |
| 2018-01-09 | A180534674 | 0.350 ppm |
| 2018-02-06 | A180534677 | 0.450 ppm |
| 2018-03-06 | A180554434 | 0.540 ppm |
| 2018-04-04 | A180574925 | 0.650 ppm |
| 2018-05-01 | A180574927 | 0.750 ppm |
| 2018-06-12 | A180575281 | 0.750 ppm |
| 2018-07-10 | A180577930 | ND |
| 2018-08-07 | A180588721 | ND |
| 2018-09-04 | A180597325 | ND |
| 2018-10-09 | A180608017 | ND |
| 2018-11-06 | 8K00500-01 | ND |
| 2018-12-04 | 8L00121-02 | ND |
| 2019-01-03 | 9A00354-01 | ND |
| 2019-02-05 | 9B00209-03 | ND |
| 2019-03-05 | 9C00265-01 | 0.550 ppm |
| 2019-04-02 | 9D00111-01 | 0.630 ppm |
| 2019-05-07 | 9E00831-03 | 0.830 ppm |
| 2019-06-04 | 9F00240-03 | 0.660 ppm |
| 2019-07-02 | 9G00143-04 | ND |
| 2019-08-06 | 9H00585-01 | ND |
| 2019-09-03 | 9I00044-03 | ND |
| 2019-10-01 | 9J00054-05 | ND |