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Redwood City Water Quality Monitoring Program Plan © 2014 DKF Solutions Group, LLC Page 14 of 41 Table 7.2 – U.S. EPA Bacteriological Criteria for Water Contact Recreation1, 2 (in colonies per 100 ml) Fresh Water Salt Water Steady State (all areas) Enterococci E. Coli Enterococci 33 126 35 Maximum at:  Designated beach 61 235 104  Moderately used area 89 298 124  Lightly used area 108 406 276  Infrequently used area 151 576 500 NOTES: 1. The criteria were published in the Federal Register, Vol. 51, No. 45 / Friday, March 7, 1986 / 8012-8016. The criteria are based on: a. Cabelli, V.J. 1983. Health Effects Criteria for Marine Recreational Waters, U.S. EPA, EPA 600/1-80-031, Cincinnati, Ohio, and b. Dufour, A.P. 1984, Health Effects Criteria for Fresh Recreational Waters, U.S. EPA, EPA 600/1-84-004, Cincinnati, Ohio. 2. The U.S. EPA criteria apply to water contact recreation only. The criteria provide for a level of production based on the frequency of usage of a given water contact recreation area. The criteria may be employed in special studies within this region to differentiate between pollution sources or to supplement the current coliform objectives for water contact recreation. 6.2.A. - Page 180