DES MOINES - Officials in Northeast Iowa continue to report wastewater bypassing their treatment facilities as the result of heavy rainfall the past four days.

According to the Iowa Department of Natural Resources, Readlyn began bypassing early Wednesday from its treatment plant. The water is going into a ditch along 240th Street and flowing to the Wapsipinicon River about two miles away. This recent event is in addition to a bypass reported Monday.

Cresco began bypassing untreated wastewater from four lift stations and a manhole at its treatment plant early Wednesday. The discharge is reaching unnamed tributaries that lead to Silver Creek.

In addition to the bypasses, the Mississippi River turned a bright green color up and down its course from the U.S. Highway 30 bridge near Clinton.

The DNR in a prepared statement said the color is likely caused by aquatic plants and algae, possibly flushed out of backwater areas by rising water. State officials notified public water users downstream after the color was reported at 7 p.m. Tuesday.

The plume of bright green reached the Iowa-American water treatment plant at Davenport at about 11:15 a.m. Wednesday.