(d) Total coliform MCLs: No more than 5% of the monthly samples may be total coliform positive. Fecal coliform MCLs: The occurrence of 2 consecutive total coliform positive samples, one of which contains fecal coliform, constitutes an acute MCL violation. The Sweetwater Authority did not violate either MCL in 1999. Results are based on the distribution system's highest monthly percent positives. Compliance is fecal coliform, constitutes an acute MCL violation. The Sweetwater Authority did not violate either MCL in 1999.Results are based on the distribution system's highest monthly percent positives. Compliance is based on the combined distribution system sampling from all treatment plants. 1,906 samples were analyzed in 1999. based on the combined distribution system sampling from all treatment plants.1,872 samples were analyzed in 2000.