Water Quality Conditions In

Water Quality Conditions in

Temecula Groundwater Basin

Constituent / Water Quality Objective
(mg/l) / Ambient Water Quality
(USGS Report: California GAMA Program 2004) (mg/l)
Range Average
total dissolved Solids / 500* / 259 - 540 / 461
chloride / 250 / 57.8 - 208 / 97
sulfate / 250 / 13.4 - 173 / 79
nitrate - no3 / 10 / 1.8 - 26.1 / 12.0
nitrate - n / 2.2 / 0.41 - 5.8 / 2.7
iron / 0.3 / .001 - .008 / .004
manganese / 0.05 / .0001 - .009 / .001
boron / 0.75 / .041 - 1.054 / 0.29

* except for groundwaters located within 250 feet of the surface for the most downstream 4,2000 acres of the Pauba HSA which drain directly to the most downstream 2.7 mile segment of Temecula Creek, where the water quality object for total dissolved solids is 750 mg/l.

Compliance With Antidegradation Policy

1.  if discharge will degrade water quality, discharge will only be allowed if any change in water quality:

§  will be consistent with maximum benefit to the people of the state.

§  will not affect present or future beneficial uses.

§  will not result in water quality less than prescribed in the basin plan.

2.  best practical treatment must be used to avoid pollution and maintain highest water quality consistent with maximum benefit to the people of the state.

Beneficial Uses Of Groundwater And Surface Water In The Temecula Basin

groundwater / surface water
municipal / municipal
agricultural / agricultural
industrial / industrial process supply
- / industrial service supply
- / groundwater recharge
- / contact water recreation
- / non contact water recreation
- / warm freshwater habitat
- / cold freshwater habitat
- / wildlife habitat