Chromium (total)
Middletown Water Department
Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.
36
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 | 0.203 ppb | 10 | 6 | ND - 0.390 ppb |
| 2015 | 0.159 ppb | 10 | 6 | ND - 0.310 ppb |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EPA Maximum Contaminant
Level (MCL) 100 ppb
The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-06-09 | IOC1 200397419 | ND |
| 2014-06-09 | IOCR 200397420 | ND |
| 2014-06-09 | IOCR 200397421 | ND |
| 2014-06-09 | IOC1 200397418 | ND |
| 2014-08-11 | 2025471001 | 0.290 ppb |
| 2014-08-11 | 2025471003 | 0.390 ppb |
| 2014-08-11 | 2025471004 | 0.350 ppb |
| 2014-08-11 | 2025471002 | 0.370 ppb |
| 2014-11-19 | 2041458001 | 0.300 ppb |
| 2014-11-19 | 2041458003 | 0.330 ppb |
| 2015-02-26 | 2057162005 | 0.240 ppb |
| 2015-02-26 | 2057162001 | 0.220 ppb |
| 2015-02-26 | 2057162007 | 0.310 ppb |
| 2015-02-26 | 2057162003 | 0.280 ppb |
| 2015-05-20 | 2072636003 | 0.260 ppb |
| 2015-05-20 | 2072636001 | 0.280 ppb |
| 2015-05-26 | IOC1 200417356 | ND |
| 2015-05-26 | IOC1 200417357 | ND |
| 2015-05-26 | IOCR 200417358 | ND |
| 2015-05-26 | IOCR 200417359 | ND |
| 2016-06-20 | IOC1 200442684 | ND |
| 2016-06-20 | IOCR 200442685 | ND |
| 2016-06-29 | IOCR 200443423 | ND |
| 2016-06-29 | IOC1 200443422 | ND |
| 2017-05-16 | RIOC 200467168 | ND |
| 2017-05-16 | RIOC 200467167 | ND |
| 2017-05-16 | IOCS 200467165 | ND |
| 2017-05-16 | IOCS 200467163 | ND |
| 2018-03-01 | IOCR 200489002 | ND |
| 2018-03-01 | IOC1 200489001 | ND |
| 2018-04-16 | IOCR 200492151 | ND |
| 2018-04-16 | IOC1 200492152 | ND |
| 2019-05-13 | IOCR 200531894 | ND |
| 2019-05-13 | IOC1 200531892 | ND |
| 2019-05-21 | IOCR 200533084 | ND |
| 2019-05-21 | IOC1 200533082 | ND |