Chromium (total)
Rockford
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.
114
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 | 0.0513 ppb | 43 | 4 | ND - 1.27 ppb |
| 2015 | 0.0438 ppb | 36 | 5 | ND - 0.417 ppb |
| 2016 | ND | 2 | 0 | ND |
| 2017 | 0.257 ppb | 23 | 1 | ND - 5.90 ppb |
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 1 | 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 |
|---|---|---|
| 2014-01-21 | 4012700-03 | ND |
| 2014-01-21 | 4012700-04 | ND |
| 2014-01-21 | 4012700-05 | ND |
| 2014-01-21 | 4012700-06 | ND |
| 2014-01-22 | 4012700-01 | ND |
| 2014-01-22 | 4012700-02 | ND |
| 2014-01-27 | 4013503-02 | ND |
| 2014-01-28 | 4013503-01 | ND |
| 2014-01-31 | 4020631-01 | ND |
| 2014-01-31 | 4020631-02 | ND |
| 2014-01-31 | 4020631-03 | ND |
| 2014-01-31 | 4020631-04 | ND |
| 2014-01-31 | 4020631-05 | ND |
| 2014-02-18 | 4022291-01 | ND |
| 2014-02-18 | 4022289-01 | ND |
| 2014-02-25 | 4023202-01 | ND |
| 2014-07-08 | 801404-11773 | ND |
| 2014-07-08 | 801677-11773 | 1.27 ppb |
| 2014-07-08 | 801398-11773 | ND |
| 2014-07-08 | 801414-11773 | ND |
| 2014-07-08 | 801390-11773 | ND |
| 2014-07-08 | 801683-11773 | ND |
| 2014-07-08 | 801394-11773 | ND |
| 2014-07-08 | 801396-11773 | 0.439 ppb |
| 2014-07-08 | 801412-11773 | ND |
| 2014-07-08 | 801665-11773 | 0.279 ppb |
| 2014-07-08 | 801679-11773 | ND |
| 2014-07-08 | 801400-11773 | ND |
| 2014-07-08 | 801669-11773 | ND |
| 2014-07-08 | 801667-11773 | ND |
| 2014-07-08 | 801685-11773 | ND |
| 2014-07-08 | 801410-11773 | 0.220 ppb |
| 2014-07-08 | 801392-11773 | ND |
| 2014-07-08 | 801406-11773 | ND |
| 2014-07-08 | 801673-11773 | ND |
| 2014-07-08 | 801681-11773 | ND |
| 2014-07-08 | 801675-11773 | ND |
| 2014-07-23 | 4073622-05 | ND |
| 2014-07-23 | 4073622-01 | ND |
| 2014-07-23 | 4073622-04 | ND |
| 2014-10-28 | 4104357-01 | ND |
| 2014-12-05 | 4121752-01 | ND |
| 2014-12-12 | 4122805-01 | ND |
| 2015-01-08 | 838246-13206 | ND |
| 2015-01-08 | 838250-13206 | ND |
| 2015-01-08 | 838244-13206 | ND |
| 2015-01-08 | 838225-13206 | 0.417 ppb |
| 2015-01-08 | 838227-13206 | ND |
| 2015-01-08 | 838235-13206 | ND |
| 2015-01-08 | 838233-13206 | ND |
| 2015-01-08 | 838264-13206 | ND |
| 2015-01-08 | 838218-13206 | ND |
| 2015-01-08 | 838258-13206 | 0.340 ppb |
| 2015-01-08 | 838212-13206 | ND |
| 2015-01-08 | 838210-13206 | ND |
| 2015-01-08 | 838216-13206 | ND |
| 2015-01-08 | 838256-13206 | ND |
| 2015-01-08 | 838252-13206 | ND |
| 2015-01-08 | 838248-13206 | 0.404 ppb |
| 2015-01-08 | 838242-13206 | ND |
| 2015-01-08 | 838237-13206 | ND |
| 2015-01-08 | 838214-13206 | ND |
| 2015-01-08 | 838254-13206 | ND |
| 2015-01-08 | 838220-13206 | ND |
| 2015-01-08 | 838208-13206 | ND |
| 2015-01-28 | 5013651-04 | ND |
| 2015-04-15 | 5042507-02 | ND |
| 2015-06-17 | 5062896-01 | ND |
| 2015-07-09 | 870165-14539 | 0.201 ppb |
| 2015-07-13 | 870168-14539 | ND |
| 2015-07-13 | 870172-14539 | ND |
| 2015-07-13 | 870174-14539 | ND |
| 2015-07-13 | 870176-14539 | ND |
| 2015-07-13 | 870170-14539 | ND |
| 2015-07-13 | 870178-14539 | ND |
| 2015-07-13 | 870180-14539 | 0.216 ppb |
| 2015-09-14 | 882884-14953 | ND |
| 2015-12-09 | 897657-15547 | ND |
| 2015-12-09 | 897655-15547 | ND |
| 2016-10-12 | 6102040-01 | ND |
| 2016-12-14 | 6122205-01 | ND |
| 2017-01-06 | 7011622-01 | ND |
| 2017-01-06 | 7011622-02 | ND |
| 2017-01-13 | 7012600-01 | ND |
| 2017-01-13 | 7012600-02 | ND |
| 2017-01-13 | 7012600-04 | ND |
| 2017-01-13 | 7012603-01 | 5.90 ppb |
| 2017-01-13 | 7012603-02 | ND |
| 2017-01-13 | 7012603-03 | ND |
| 2017-01-20 | 7013468-04 | ND |
| 2017-01-20 | 7013468-01 | ND |
| 2017-01-20 | 7013468-02 | ND |
| 2017-02-03 | 7021369-02 | ND |
| 2017-02-03 | 7021369-01 | ND |
| 2017-02-10 | 7022427-01 | ND |
| 2017-03-08 | 7031384-01 | ND |
| 2017-05-26 | 7055219-01 | ND |
| 2017-07-24 | 7075084-07 | ND |
| 2017-07-24 | 7075084-06 | ND |
| 2017-07-24 | 7075084-05 | ND |
| 2017-07-24 | 7075084-02 | ND |
| 2017-07-24 | 7075084-03 | ND |
| 2017-10-13 | 7103385-03 | ND |
| 2017-12-06 | 7121184-03 | ND |
| 2018-01-29 | 18A0571-01_01 | ND |
| 2018-01-29 | 18A0571-02_01 | ND |
| 2018-04-06 | 8042289-03 | ND |
| 2018-04-18 | 8043420-02 | ND |
| 2018-05-30 | 18E1190-01_01 | ND |
| 2018-06-12 | 8062626-01 | ND |
| 2018-10-31 | 18K0014-01_01 | ND |
| 2018-12-05 | 18L0178-01_01 | ND |
| 2018-12-05 | 18L0178-02_01 | ND |
| 2019-11-08 | 9112291-01 | ND |