Has CCWD found Microcystin in any of its reservoirs?
The results of past analyses indicate that occasionally there is some Microcystin being produced in Mallard and Los Vaqueros Reservoirs by Microcystis. However, levels at both locations did not exceed the World Health Organization’s guideline of 1.0 ug/L. Furthermore, CCWD can avoid bringing the algae into its system because water pipes in the reservoirs are located well below the surface where the algae can be present. No Microcystin has ever been detected in water leaving CCWD’s treatment plants.

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1. Is Microcystis toxic?
2. Has Microcystis been found in the Sacramento/San Joaquin Delta?
3. Is it dangerous to drink treated Delta water?
4. Has CCWD found Microcystin in any of its reservoirs?
5. Are there government regulations on Microcystis or Microcystin levels in the United States?
6. Should we be concerned about Microcystis in the future?