Table 3-1: 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 < 230c
Non-contact Water Recreationd
 mean < 2000
90th percentile < 4000
Municipal Supply:
- Surface Watere geometric mean < 20 geometric mean < 100
- Groundwater < 1.1f
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/100 ml 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. Source: DOHS recommendation.

f. 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 141.21(f), revised June 10, 1992, are acceptable.