Nitrite
CTWC - Shoreline Region-Guilford System
Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.
127
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 |
|---|---|---|---|---|
| 2018 | ND | 15 | 0 | ND |
| 2019 | ND | 23 | 0 | ND |
| 2020 | ND | 24 | 0 | ND |
| 2021 | ND | 19 | 0 | ND |
| 2022 | ND | 21 | 0 | ND |
| 2023 | ND | 25 | 0 | ND |
ppm = parts per million
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 1 ppm
The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.
ppm = parts per million
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-16 | BZ73475NOX | ND |
| 2018-03-30 | CA11466NOX | ND |
| 2018-06-04 | CA63507NOX | ND |
| 2018-06-13 | CA69714NOX | ND |
| 2018-06-13 | CA69718NOX | ND |
| 2018-06-13 | CA69716NOX | ND |
| 2018-06-13 | CA69715NOX | ND |
| 2018-06-13 | CA69717NOX | ND |
| 2018-06-20 | CA75544NOX | ND |
| 2018-09-19 | NOX 200506169 | ND |
| 2018-10-09 | NOX 200508367 | ND |
| 2018-11-08 | NOX 200512198 | ND |
| 2018-11-21 | NOX 200513547 | ND |
| 2018-11-26 | NOX 200513931 | ND |
| 2018-12-10 | NOX 200515324 | ND |
| 2019-01-07 | NOX 200517748 | ND |
| 2019-01-30 | NOX 200520057 | ND |
| 2019-02-06 | NOX 200520859 | ND |
| 2019-02-07 | NOX 200521039 | ND |
| 2019-03-05 | NOX 200523518 | ND |
| 2019-04-02 | NOX 200526702 | ND |
| 2019-04-08 | NOX 200527439 | ND |
| 2019-05-06 | NOX 200530919 | ND |
| 2019-06-05 | NOX 200535054 | ND |
| 2019-06-24 | NOX 200537625 | ND |
| 2019-07-09 | NOX 200539960 | ND |
| 2019-07-10 | NOX 200539996 | ND |
| 2019-07-10 | NOX 200539998 | ND |
| 2019-07-16 | NOX 200541091 | ND |
| 2019-07-16 | NOX 200540648 | ND |
| 2019-07-16 | NOX 200540644 | ND |
| 2019-08-05 | NOX 200545065 | ND |
| 2019-09-11 | NOX 200548435 | ND |
| 2019-09-17 | NOX 200549238 | ND |
| 2019-09-18 | NOX 200549465 | ND |
| 2019-10-02 | NOX 200551087 | ND |
| 2019-11-12 | NOX 200556637 | ND |
| 2019-12-05 | NOX 200559108 | ND |
| 2020-01-09 | NOX 200562365 | ND |
| 2020-01-20 | NOX 200563509 | ND |
| 2020-01-20 | NOX 200563521 | ND |
| 2020-01-21 | NOX 200563499 | ND |
| 2020-01-21 | NOX 200563515 | ND |
| 2020-01-21 | NOX 200563516 | ND |
| 2020-01-28 | NOX 200564211 | ND |
| 2020-01-28 | NOX 200564212 | ND |
| 2020-02-10 | NOX 200565531 | ND |
| 2020-02-11 | NOX 200565799 | ND |
| 2020-02-11 | NOX 200565797 | ND |
| 2020-02-25 | NOX 200567275 | ND |
| 2020-02-25 | NOX 200567276 | ND |
| 2020-03-03 | NOX 200567975 | ND |
| 2020-04-06 | NOX 200572489 | ND |
| 2020-05-05 | NOX 200574587 | ND |
| 2020-06-02 | NOX 200577714 | ND |
| 2020-07-08 | NOX 200582000 | ND |
| 2020-07-13 | NOX 200582477 | ND |
| 2020-08-12 | NOX 200586368 | ND |
| 2020-09-15 | NOX 200590367 | ND |
| 2020-10-21 | NOX 200595066 | ND |
| 2020-11-02 | NOX 200596424 | ND |
| 2020-12-09 | NOX 200600816 | ND |
| 2021-01-05 | NOX 200602753 | ND |
| 2021-01-06 | NOX 200602994 | ND |
| 2021-01-11 | NOX 200603457 | ND |
| 2021-01-25 | NOX 200604768 | ND |
| 2021-02-17 | NOX 200607136 | ND |
| 2021-03-01 | NOX 200608135 | ND |
| 2021-04-20 | NOX 200613997 | ND |
| 2021-05-12 | NOX 200616876 | ND |
| 2021-06-02 | NOX 200619284 | ND |
| 2021-06-29 | NOX 200622710 | ND |
| 2021-07-01 | NOX 200622841 | ND |
| 2021-07-07 | NOX 200623650 | ND |
| 2021-07-20 | NOX 200625447 | ND |
| 2021-08-09 | NOX 200627644 | ND |
| 2021-09-21 | 300064946 300064949 | ND |
| 2021-10-04 | N300073657 300073660 | ND |
| 2021-11-01 | N300093127 300093130 | ND |
| 2021-11-15 | N300102725 300102726 | ND |
| 2021-12-08 | N300115259 300115262 | ND |
| 2022-01-11 | CK14095 | ND |
| 2022-01-11 | CK14105 | ND |
| 2022-01-27 | CK24307 | ND |
| 2022-02-15 | CK68298 | ND |
| 2022-02-28 | CK76192 | ND |
| 2022-03-07 | CK80900 | ND |
| 2022-03-28 | CK96121 | ND |
| 2022-04-25 | CL16306 | ND |
| 2022-05-11 | CL27611 | ND |
| 2022-06-06 | CL49387 | ND |
| 2022-06-14 | CL56476 | ND |
| 2022-07-20 | CL83807 | ND |
| 2022-08-15 | CM05635 | ND |
| 2022-08-15 | CM05636 | ND |
| 2022-08-24 | CM14827 | ND |
| 2022-08-29 | CM17830 | ND |
| 2022-09-28 | CM43103 | ND |
| 2022-10-04 | CM49564 | ND |
| 2022-11-02 | CM75295 | ND |
| 2022-12-01 | CM94640 | ND |
| 2022-12-01 | CM94644 | ND |
| 2023-01-04 | CN17497 | ND |
| 2023-01-05 | CN17020 | ND |
| 2023-01-09 | CN19603 | ND |
| 2023-01-10 | CN20798 | ND |
| 2023-02-08 | CN39378 | ND |
| 2023-02-13 | CN41858 | ND |
| 2023-03-13 | CN59172 | ND |
| 2023-04-05 | CN77492 | ND |
| 2023-05-10 | CO03350 | ND |
| 2023-06-05 | CO19978 | ND |
| 2023-06-13 | CO27277 | ND |
| 2023-08-10 | CO71352 | ND |
| 2023-08-28 | CO85102 | ND |
| 2023-09-05 | CO90692 | ND |
| 2023-09-12 | CO95874 | ND |
| 2023-09-12 | CO95875 | ND |
| 2023-09-12 | CO95877 | ND |
| 2023-10-12 | CP23629 | ND |
| 2023-10-23 | CP31868 | ND |
| 2023-11-06 | CP42068 | ND |
| 2023-11-28 | CP55321 | ND |
| 2023-11-28 | CP55320 | ND |
| 2023-11-29 | CP56432 | ND |
| 2023-11-29 | CP56434 | ND |
| 2023-12-04 | CP59688 | ND |