LOS ANGELES (AP) — Eleven companies and landowners blamed for polluting Southern California water supplies will pay about $6.6 million to clean up the contamination.

The U.S. Environmental Protection Agency announced Tuesday that it’s reached agreements to fund groundwater cleanup at a South El Monte Superfund site.

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The agency claimed the current or former landowners and business operators polluted the groundwater with toxic industrial solvents.

The agreements cover only a portion of the eight-square-mile Superfund site in the San Gabriel Valley east of Los Angeles.

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Last fall, Northrop Grumman Systems Corp. was ordered to clean up groundwater contamination at the Superfund site, at a cost of about $20 million.

The EPA says several tons of contaminants have been removed since groundwater cleanup began at the Superfund site in 2008.

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