Recent
Water Quality Results
Water
quality reports are found in the table below. The substances shown
are ones that CCWD customers have the most questions about.
You can also view the CCWD
Annual Water Quality Report,
which lists the annual results for these substances as well as many
others.
Click here for
definition of terms used in this table. |
|
| District Chemist/Microbiologists Jaci Paulline and Ed Nishikawa test CCWD water samples. |
Have
questions? Call the CCWD Water Quality Hotline at (925) 688-8156
or e-mail us. |
| Substance |
Maximum
Contaminant Level* |
Most Recent
Result |
Date |
|
Arsenic |
0.01 mg/L |
< 0.002 mg/L + |
1/09/08 |
|
Chloride |
No MCL (CCWD’s goal: 65 mg/L + or lower)
|
58 mg/L + |
5/06/08 |
|
Chlorine Residual |
4.0 mg/L +
|
3.1 mg/L + |
5/06/08 |
|
Mercury |
0.002 mg/L + |
< 0.001 mg/L + |
1/09/08 |
|
Radon*** |
300 pci/L**** |
< 100 pci/L |
1/07 |
|
Total Trihalomethanes |
(0.080 mg/L + beginning Jan 2002)
|
0.024 mg/L + |
1/08 |
|
Hardness |
No MCL
|
110 mg/L + |
4/15/08 |
|
Hardness |
No MCL
|
6.4 grains/gallon |
4/15/08 |
|
Total Coliforms |
>5% positive
|
0.0% positive |
4/08 |
*
Maximum Contaminant Level (MCL): The highest
level of a contaminant that is allowed in drinking water based on health
risk coupled with economic and technical feasibility for control/treatment.
** ug/L = micrograms per liter = parts per billion
*** Raw water sample
**** pci/L = picocuries per liter
+ mg/L
= milligrams per liter or parts per million
For
more information, visit:
United
States Environmental Protection Agency
California
Department of Health Services
|
