Effective Date

07/08/1998

Section 128-4.1 Water quality standards.

(a) The water in all reservoirs, Lake Gilead, and Lake

Gleneida, shall meet the following standards of quality:

(1) 6 NYCRR Parts 701 (narrative standards) and 703

(standards applicable to Class AA waters):

(i) For purposes of determining compliance with this

subpart, the Department shall take water samples from the reservoirs; and

(ii) Where total coliform standards exceed the standards set

forth in 6 NYCRR Parts 701 and 703, and are determined by the Department to

be due to a non-perennial, non-anthropogenic source, such exceedances shall

not be included in calculating whether a violation of these rules and

regulations has occurred.

(2) The New York State Department of Environmental

Conservation Technical and Operational Guidance Series (TOGS) 1.1.1,

Ambient Water Quality Standards and Guidance Values (October 22, 1993)

which sets forth the ambient water quality standards and guidance values

for principal organic chemicals and synthetic organic chemicals.

(b) The water within 500 feet of the aqueduct effluent

chamber located at a terminal reservoir (Kensico, West Branch, New Croton,

Ashokan and Rondout) shall meet the following coliform standard:

(1) Raw water fecal coliform concentrations shall be equal

to or less than 20 colonies per 100 milliliters or total coliform

concentration shall be equal to or less than 100 colonies per 100

milliliters in at least 90 percent of the measurements made over any

consecutive six month period. For purposes of determining compliance with

this subpart, a minimum of five samples per week will be taken from each

reservoir. If both fecal and total coliform analyses are performed, the

fecal coliform results shall take precedence over the total coliform

analysis.

(i) Where fecal coliform standards exceed the above

standards, and are determined by the Department to be due to non-perennial,

non- anthropogenic sources, such exceedances shall not be included in

calculating whether a violation of these rules and regulations has

occurred.

(c) The Department shall, on an annual basis, conduct a

review of all reservoirs and controlled lakes for the purpose of

determining whether each reservoir and controlled lake meets or fails to

meet the water quality standards set forth in subdivisions (a) and (b) of

this section, as applicable. The results of the Department's review,

together with the calculations used in arriving at the results for each

reservoir, shall be published in a report which shall be made available to

the public upon request.