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East Mission Bay contamination remains a mystery



San Diego water officials say the De Anza Cove trailer park is probably not the source of contamination in East Mission Bay. Parts of the bay remain closed to swimmers and boaters because it's still polluted. KPBS Radio's Andrew Phelps has more.

The water is now tested every day. Workers can't find any sewage problems at the trailer park or anywhere else around the bay. Health officials rushed to close the water this week when someone reported a sewage spill seen three weeks ago.

That's the same time bacteria levels began to rise. A clean-water group blasted the city and county for not closing the bay sooner. County water-quality chief Mark McPherson says pollution warning signs were posted since July 5th.

McPherson: "People have made it sound like the advisories mean nothing, and that is not the case. The advisories say, Stay out of the water. It has bacteria in it. It was important. We did post it."

Investigators are still trying to pinpoint the source of the pollution, and they say they may never find it. For KPBS, I'm Andrew Phelps.

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