Delaware Administrative Code
Title 7 - Natural Resources and Environmental Control
5000 - Division of Watershed Stewardship
7400 - Watershed Assessment Section
7402 - Shellfish Sanitation Regulations
Appendix 4

Other-Than-Approved Shellfish Water Bacteriological Standards For Depurated Shellfish

The total coliform geometric mean MPN of the water does sample results shall not exceed 700 per 100 ml and not more than 10% or 90th percentile of the samples shall exceed an MPN of 2,300 per 100 ml for a 5-tube decimal dilution test (or an MPN of 3,300 per 100 ml for a 3-tube decimal dilution test).

AND/OR

The fecal coliform geometric mean MPN or MF (mTEC) of the water sample results shall not exceed 88 per 100 ml and not more than 10% or 90th percentile of the samples exceed an MPN of 260 per 100 ml for a 5-tube decimal dilution test, or an MPN of 300 per 100 ml for a 3-tube decimal dilution test) test, or an CFU of 163 per 100 ml for a MF (mTEC) test.