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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.000522 ppm | 23 | 3 | ND - 0.00500 ppm |
2015 | ND | 16 | 0 | ND |
2016 | ND | 17 | 0 | ND |
2017 | ND | 10 | 0 | ND |
2018 | ND | 15 | 0 | ND |
2019 | ND | 23 | 0 | ND |
ppm = parts per million
State and national drinking water standards and health guidelines
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 |
---|---|---|
2014-01-06 | 142NOX | 0.00500 ppm |
2014-01-29 | 140130CWCDNOX | ND |
2014-01-29 | 140130CWCEIOC1 | ND |
2014-01-29 | 91886NOX | ND |
2014-01-29 | 91887NOX | ND |
2014-02-06 | 91982NOX | ND |
2014-02-24 | 92178NOX | ND |
2014-03-05 | 2669IOC1 | ND |
2014-03-05 | 2673IOC1 | 0.00300 ppm |
2014-03-05 | 2674IOC1 | 0.00400 ppm |
2014-03-05 | 2676IOC1 | ND |
2014-04-01 | 4079NOX | ND |
2014-06-12 | 8366IOC1 | ND |
2014-06-12 | 8367IOC1 | ND |
2014-06-12 | 93879NOX | ND |
2014-06-12 | 93880NOX | ND |
2014-06-12 | 93881NOX | ND |
2014-07-22 | 10660NOX | ND |
2014-08-13 | 140915-0115IOC1 | ND |
2014-08-13 | 141007-0044IOC1 | ND |
2014-08-13 | BG93593NOX | ND |
2014-08-13 | BG93595NOX | ND |
2014-11-20 | BH44138NOX | ND |
2015-02-11 | BH72588NOX | ND |
2015-02-11 | BH72586NOX | ND |
2015-02-11 | BH72587NOX | ND |
2015-02-11 | BH72589NOX | ND |
2015-02-12 | BH73177NOX | ND |
2015-04-01 | BH90872NOX | ND |
2015-06-02 | BJ24597NOX | ND |
2015-06-02 | BJ24602NOX | ND |
2015-06-02 | BJ24619NOX | ND |
2015-06-02 | BJ24600NOX | ND |
2015-06-02 | BJ24617NOX | ND |
2015-06-03 | BJ25406NOX | ND |
2015-06-03 | BJ25404NOX | ND |
2015-07-07 | BJ42388NOX | ND |
2015-07-27 | BJ63961NOX | ND |
2015-10-07 | BK03851NOX | ND |
2016-01-11 | BK50861NOX | ND |
2016-01-11 | BK50864NOX | ND |
2016-01-12 | BK51721NOX | ND |
2016-01-19 | BK54776NOX | ND |
2016-01-19 | BK54777NOX | ND |
2016-01-27 | BK58354NOX | ND |
2016-02-11 | BK64352NOX | ND |
2016-03-14 | BK78121NOX | ND |
2016-04-06 | BN07656NOX | ND |
2016-06-01 | BN44876NOX | ND |
2016-07-06 | BN67632NOX | ND |
2016-07-12 | BN71483NOX | ND |
2016-07-12 | BN71475NOX | ND |
2016-07-13 | BN72281NOX | ND |
2016-07-13 | BN72289NOX | ND |
2016-07-13 | BN72288NOX | ND |
2016-10-12 | BV46547NOX | ND |
2017-01-17 | BX30298NOX | ND |
2017-01-17 | BX30299NOX | ND |
2017-01-18 | BX31347NOX | ND |
2017-01-30 | BX40966NOX | ND |
2017-03-08 | BX82062NOX | ND |
2017-03-08 | BX82063NOX | ND |
2017-04-03 | BX97712NOX | ND |
2017-07-17 | BY61083NOX | ND |
2017-10-24 | BZ27135NOX | ND |
2017-12-04 | BZ49884NOX | ND |
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 |