Carbofuran
San Antonio Water System
Carbofuran is a highly toxic insecticide phased out from use in the U.S. since 2009 due to the risks it posed to children and the environment.
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 | ND | 31 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 8 | 0 | ND |
| 2017 | ND | 45 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 7 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.7 ppb
The EWG Health Guideline of 0.7 ppb for carbofuran was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to the brain and nervous system.
EPA Maximum Contaminant
Level (MCL) 40 ppb
The legal limit for carbofuran, established in 1991, was based on a toxicity study in laboratory animals conducted in the 1980s. This limit may not fully protect against harm to the brain and nervous system due to carbofuran exposure.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-13 | AC38643 | ND |
| 2014-01-13 | AC38650 | ND |
| 2014-01-13 | AC38644 | ND |
| 2014-01-13 | AC38641 | ND |
| 2014-01-13 | AC38640 | ND |
| 2014-01-14 | AC38885 | ND |
| 2014-01-14 | AC38886 | ND |
| 2014-01-14 | AC38884 | ND |
| 2014-01-14 | AC38887 | ND |
| 2014-01-14 | AC38900 | ND |
| 2014-01-15 | AC39112 | ND |
| 2014-03-31 | AC48818 | ND |
| 2014-03-31 | AC48822 | ND |
| 2014-03-31 | AC48819 | ND |
| 2014-03-31 | AC48820 | ND |
| 2014-03-31 | AC48821 | ND |
| 2014-03-31 | AC48824 | ND |
| 2014-05-13 | AC54009 | ND |
| 2014-05-13 | AC54010 | ND |
| 2014-06-30 | AC58430 | ND |
| 2014-06-30 | AC58431 | ND |
| 2014-07-29 | AC61400 | ND |
| 2014-07-29 | AC61402 | ND |
| 2014-07-29 | AC61399 | ND |
| 2014-07-31 | AC61807 | ND |
| 2014-09-02 | AC65481 | ND |
| 2014-09-29 | AC68432 | ND |
| 2014-09-29 | AC68431 | ND |
| 2014-09-29 | AC68435 | ND |
| 2014-11-25 | AC73021 | ND |
| 2014-11-25 | AC73025 | ND |
| 2016-06-28 | AD42290 | ND |
| 2016-09-01 | AD47740 | ND |
| 2016-11-02 | AD56263 | ND |
| 2016-11-02 | AD56265 | ND |
| 2016-11-02 | AD56264 | ND |
| 2016-11-02 | AD56266 | ND |
| 2016-11-03 | AD56549 | ND |
| 2016-11-29 | AD59429 | ND |
| 2017-01-30 | AD67674 | ND |
| 2017-01-30 | AD67673 | ND |
| 2017-01-30 | AD67664 | ND |
| 2017-02-01 | AD68196 | ND |
| 2017-02-01 | AD68197 | ND |
| 2017-02-02 | AD68513 | ND |
| 2017-03-06 | AD73520 | ND |
| 2017-03-06 | AD73521 | ND |
| 2017-03-06 | AD73519 | ND |
| 2017-03-29 | AD77544 | ND |
| 2017-03-29 | AD77543 | ND |
| 2017-03-29 | AD77546 | ND |
| 2017-03-29 | AD77542 | ND |
| 2017-03-29 | AD77545 | ND |
| 2017-03-30 | AD77867 | ND |
| 2017-03-30 | AD77866 | ND |
| 2017-03-30 | AD77865 | ND |
| 2017-04-25 | AD81016 | ND |
| 2017-07-06 | AD88547 | ND |
| 2017-07-06 | AD88546 | ND |
| 2017-07-06 | AD88541 | ND |
| 2017-09-11 | AD95628 | ND |
| 2017-09-11 | AD95622 | ND |
| 2017-09-11 | AD95626 | ND |
| 2017-10-17 | AE01161 | ND |
| 2017-10-18 | AE01421 | ND |
| 2017-10-18 | AE01423 | ND |
| 2017-10-18 | AE01424 | ND |
| 2017-12-04 | AE06633 | ND |
| 2017-12-05 | AE06827 | ND |
| 2017-12-05 | AE06828 | ND |
| 2017-12-05 | AE06826 | ND |
| 2017-12-06 | AE07071 | ND |
| 2017-12-07 | AE07285 | ND |
| 2017-12-07 | AE07280 | ND |
| 2017-12-07 | AE07282 | ND |
| 2017-12-07 | AE07286 | ND |
| 2017-12-07 | AE07284 | ND |
| 2017-12-07 | AE07281 | ND |
| 2017-12-08 | AE07459 | ND |
| 2017-12-08 | AE07460 | ND |
| 2017-12-13 | AE07714 | ND |
| 2017-12-13 | AE07712 | ND |
| 2017-12-13 | AE07713 | ND |
| 2017-12-20 | AE07874 | ND |
| 2018-03-01 | AE16435 | ND |
| 2018-05-10 | AE25996 | ND |
| 2018-07-02 | AE32317 | ND |
| 2018-08-31 | AE39189 | ND |
| 2018-11-19 | AE46529 | ND |
| 2018-12-13 | AE48877 | ND |
| 2019-01-30 | AE52297 | ND |
| 2019-01-31 | AE52517 | ND |
| 2019-03-28 | AE60541 | ND |
| 2019-03-28 | AE60540 | ND |
| 2019-04-23 | AE63416 | ND |
| 2019-04-25 | AE63797 | ND |
| 2019-11-26 | AE90676 | ND |