Caffeine
City of Rohnert Park
Caffeine, from coffee and other beverages, is a key indicator of water contamination from wastewater effluent.
8
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 | N/A | 0 | 0 | N/A |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-12-29 | 9590-031-1037 | ND |
| 2016-09-06 | 9590-018-0907 | ND |
| 2016-09-06 | 9590-021-0910 | ND |
| 2016-09-06 | 9590-022-0950 | ND |
| 2016-09-06 | 9590-027-0850 | ND |
| 2016-09-06 | 9590-034-0945 | ND |
| 2016-09-06 | 9590-035-1005 | ND |
| 2016-09-13 | 9590-033-0941 | ND |