N.H. Admin. Code Env, Env-Wq, ch. Env-Wq 1700, app E

Current through Register No. 50, December 12, 2024

Appendix E - SUMMARY OF BACTERIA STANDARDS FROM RSA 485-A:8

Type of Waters	Standard
Class A other than designated beach areas	Not more than: (1) A geometric mean based on at least 3 samples obtained over a 60-day period of 47 Escherichiacoli (E. coli) per 100 milliliters, unless naturally occurring; or (2) 153 E. coli per 100 milliliters in any one sample, unless naturally occurring.
Class B other than designated beach areas	Not more than: (1) A geometric mean based on at least 3 samples obtained over a 60-day period of 126 E. coli per 100 milliliters, unless naturally occurring; or (2) 406 E. coli per 100 milliliters in any one sample, unless naturally occurring.
Class A or Class B at designated beach areas	Not more than: (1) A geometric mean based on at least 3 samples obtained over a 60-day period of 47 E. coli per 100 milliliters, unless naturally occurring; or (2) 88 E. coli per 100 milliliters in any one sample, unless naturally occurring.
Tidal waters used for swimming	Not more than: (1) A geometric mean based on at least 3 samples obtained over a 60-day period of 35 enterococci per 100 milliliters, unless naturally occurring; or (2) 104 enterococci per 100 milliliters in any one sample, unless naturally occurring.
Tidal waters used for growing or taking of shellfish for human consumption	Same as for tidal waters used for swimming, PLUS must meet criteria recommended under the National Shellfish Program Manual of Operation, US DHHS, Food and Drug Administration.