WATER ENVIRONMENTAL INDICATORS  -- 1997

Point Source Pollution Management
Number of Point Source Discharges                                                           402
Wastewater Treated (millions of gallons per day)                                          54
Wastewater Generated Per Capita (gallons per person per day)                    90
Exceedance of Daily Permit Limits for Groups of Known Sources               159

Average Water Quality Index Values
Lakes 73 - Good
Creeks 70 - Good
Countywide (lakes and streams combined) 71 - Good

Exceedance of Surface Water Quality Standards
Creeks (Total)                                                                                              24
Dissolved Oxygen                                                                                          3
Turbidity                                                                                                      19
pH                                                                                                                 2
Lakes (Total)                                                                                               13
Chlorophyll-a                                                                                                 8
Turbidity                                                                                                         2
Fecal Coliform                                                                                                3

Exceedance of Surface Water Quality Action Levels
Creeks (Total)                                                                                            263
Fecal Coliform Bacteria                                                                              107
Total Phosphorus                                                                                          64
Nitrate                                                                                                          53
TKN                                                                                                            11
Ammonia                                                                                                        4
Turbidity                                                                                                       19
Biochemical Oxygen Demand                                                                          0
Dissolved Oxygen                                                                                           3
pH                                                                                                                  2

Lakes (Total)                                                                                               26
Chlorophyll-a                                                                                                  8
Secchi                                                                                                             5
Total Phosphorus                                                                                            5
Turbidity                                                                                                         2
Nitrate                                                                                                            3
Fecal coliform                                                                                                 3

Water Supply
Drinking Water Supplied by CMUD (Million Gallons/Day)                              84
Population Using CMUD Drinking Water                                               427,200  

Selected Sources of Potential Groundwater Contamination
Septic Tank Systems Permited/Installed                                                         286
Septic Tank Systems Repaired                                                                      101
Estimated Number of Septic Tank Systems                                              30,000
Sanitary Landfill Sites                                                                                        1
Land Clearing Inert Debris Landfills                                                                 14
Construction and Demolition                                                                              1

Groundwater Usage
Existing Community Wells                                                                                63
Private Wells (Calculated)                                                                         63,000
Non-Community Wells                                                                                  159
Citizens Dependent on Groundwater for Drinking Source (Calculated)      184,900

MPL Sites                                                                                                      724
Number of Sites Evaluated                                                                              255
Conatminated Drinking Water Wells detected in 1997 due to MPL Site               2