In response, Parks and Recreation director Doug Holloway has re-opened the ponds for swimming and other recreational uses.
Holloway also closed Quinn’s Pond, located just south of Esther Simplot Park, on June 21, but he re-opened it June 30 as tests showed marked declines in the bacteria.
Holloway said lab tests identified goose and dog feces as the primary sources of E. coli in the ponds.
A stormwater retention basin that wasn’t draining properly also contributed to the problem in the Esther Simplot Park ponds. The city recently drained that basin to stop bacteria in it from seeping into the park.