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Your GPW Editor-on-Occasion is Petra Fried in the City.
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Monday, June 20, 2011

Enviro-Scare: DWP to inject reclaimed water into Hansen Dam Recreation area

Hansen Dam Recreational Area is one of the most environmentally sensitive gems in the Los Angeles. The fourteen hundred acre regional park is managed by the City's Dept of Recreation and Parks via a lease from the Army Corps of Engineers.

The Big and Little Tujunga Washes empty into the wildlife lake at the base of Hansen Dam. 1/7th of the City's drinking water is filtered through the sands of Hansen Dam.

The Big Tujunga river from Big Tujunga Dam to Hansen Dam is the protected habitat of the Santa Ana Sucker (fish), and the area surrounding Hansen Dam wildlife lake is the protected habitat of both the Lesser Bell's Vireo and the Cactus Wren (birds).

So when the LADWP - who is not the best of environmental stewards - decides to dump reclaimed water into this most environmentally sensitive of areas, you probably need to worry.

Water World Weekly
The Los Angeles Department of Water and Power has wrapped up its $2 million dollar Groundwater Replenishment Treatment Pilot Study, which takes a hard look at a plan to transform wastewater into drinking water.

Officials say the $700 million dollar plan will reduce the city's reliance on imported water supplies. Currently, more than half of its drinking water comes from Northern California or the Colorado River.

The city's Donald C. Tillman Water Reclamation Plant in Encino already pumps about 40 million gallons of reclaimed water daily for irrigation and industrial uses.

Under the proposed plan, 30,000 acre feet of that water would undergo further advanced treatment processes -- including microfiltration, reverse osmoses and UV purification -- before being injected into wells under the Hansen dam.

BY 2035, LA DWP aims to increase its use of reclaimed wastewater to 8 percent.