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Redwood City Water Quality Monitoring Program Plan © 2014 DKF Solutions Group, LLC Page 13 of 41 Table 7.1: Water Quality Objectives for Coliform Bacteriaa Beneficial Use Fecal Coliform (MPN/100ml) Total Coliform (MPN/100ml) Water Contact Recreation Geometric mean < 200 90th percentile < 400 Median < 240 No sample > 10,000 Shellfish Harvestingb Median < 14 90th percentile < 43 Median < 70 90th percentile < 230 Non-contact Water Recreationd Mean < 2000 90th percentile < 4000 Municipal Supply:  Surface Waterc  Groundwater Geometric Mean < 20 Geometric Mean < 100 < 1.1e NOTES: a. Based on a minimum of five consecutive samples equally spaced over a 30-day period. b. Source: National Shellfish Sanitation Program. c. Based on a five-tube decimal dilution test or 300 MPN/100ml when a three-tube decimal dilution test is used. d. Source: Report of the Committee on Water Quality Criteria, National Technical Advisory Committee, 1968. e. Based on multiple tube fermentation technique; equivalent test results based on other analytical techniques, as specified in the National Primary Drinking Water Regulation, 40 CFR, Part 1421.21 (f), revised June 10, 1992, are acceptable. Source: San Francisco Bay Basin (Region 2) Water Quality Control Plan (Basin Plan) California RWQCB, San Francisco Bay Region Dec. 31, 2010 6.2.A. - Page 179