Section Env-Wq 1108.14 - Water Quality Standards for Designated Beaches(a) As established by RSA 485-A:8, a designated beach shall be considered unsafe for public use if: (1) The standard specified in (b)(1) or (c)(1), below, as applicable, is exceeded by 70 counts in any one sample or by any amount in 2 or more samples taken during the same sampling event; or(2) The standard specified in (b)(2) or (c)(2), below, as applicable, is exceeded in 3 samples over a 60-day period.(b) For freshwater beaches, the standards shall be: (1) For purposes of (a)(1), above, E. coli bacteria are present in numbers greater than 88 counts/100 mL of water; or(2) For purposes of (a)(2), above, E. coli bacteria are present in numbers greater than a geometric mean of 47 counts/100 mL of water.(c) For saltwater beaches, the standards shall be:(1) For purposes of (a)(1), above, Enterococci bacteria are present in numbers greater than 104 counts/100 mL of water; or(2) For purposes of (a)(2), above, Enterococci bacteria are present in numbers greater than a geometric mean of 35 counts/100 of water.(d) If test results exceed the applicable standard in (a) - (c), above, the owner shall: (1) Retest for bacteria; and(2) Post a bacteria advisory provided by the department.(e) The owner shall post a cyanobacteria advisory provided by the department whenever a cyano-bacteria scum is present in the bathing area that is dominant and represents more than 50% of the algal cell count or the total cell count of cyanobacteria at the beach area is greater than 70,000 total cells/ml of water.N.H. Code Admin. R. Env-Wq 1108.14
Derived from Volume XLI Number 19, Filed May 13, 2021, Proposed by #13198, Effective 5/1/2021, Expires 5/1/2031 (see Revision Note #3 at chapter heading for Env-Wq 1100) (formerly Env-Wq 1105.14)