|Lake Metroparks Fairport Harbor Lakefront Park|
E. coli bacteia. When the bacterial count exceeds the single sample standard of 235 E.coli/100 ml sample, advisory signs are posted at the beaches. In the absence of a warning sign, use common sense to evaluate the lake conditions prior to swimming. It is recommended bathers avoid the water for 24-48 hours after a heavy rain of one-half inch or more in a 24 hour period, or if the lake appears to be very rough and dirty.