High bacteria levels

The Oregon Health Authority reported high bacteria levels at Seaside’s Avenue U beach reporting site.

A beach advisory at Seaside’s Avenue U beach was lifted last Thursday.

The Oregon Health Authority issued the advisory last Tuesday after water samples taken west of the U Avenue parking area showed higher-than-normal levels of fecal bacteria in ocean waters.

When test results indicate that marine water bacteria levels are at or above 130 MPN, a measurement to determine the number of organisms in a sample, an advisory is issued. The Avenue U area beach showed a 132 MPN level.

Results from later samples taken by the Oregon Department of Environmental Quality showed lower bacteria levels. Contact with the water no longer poses a higher-than-normal risk.

Bacteria in coastal waters can come from a variety of sources, both near the shore and inland, Jonathan Modie, a spokesman for the health authority, said. These include development, sewage treatment plants, septic tanks, stormwater runoff, boating waste, humans and animals.

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