Michigan Administrative Code › Department - Environmental Quality › Drinking Water And Municipal Assistance Division › Supplying Water to the Public › Part 6 - STATE DRINKING WATER STANDARDS AND ANALYTICAL › Section R. 325.10611i - Enhanced treatment for Cryptosporidium; microbial toolbox; source toolbox components

Current through Vol. 24-12, July 15, 2024
Rule 611i.
(1)
				  Watershed control program is a source toolbox component. Subpart H supplies
				  that are subject to R 325.10611d receive 0.5-log Cryptosporidium treatment
				  credit for implementing a watershed control program that meets all of the
				  following requirements:
(a) Subpart H supplies
				  that intend to apply for the watershed control program credit shall notify the
				  department of this intent not later than 2 years before the treatment
				  compliance date applicable to the supply in R 325.10611g.
(b) Subpart H supplies shall submit to the
				  department a proposed watershed control plan not later than 1 year before the
				  applicable treatment compliance date in R 325.10611g. The supply shall receive
				  department approval of the watershed control plan for the supply to receive
				  watershed control program treatment credit. The watershed control plan shall
				  include all of the following elements:
(i)
				  Identification of an "area of influence" outside of which the likelihood of
				  Cryptosporidium or fecal contamination affecting the treatment plant intake is
				  not significant. This is the area to be evaluated in future watershed surveys
				  under subdivision (e) (ii) of this subrule.
(ii) Identification of both potential and
				  actual sources of Cryptosporidium contamination and an assessment of the
				  relative impact of these sources on the supply's source water
				  quality.
(iii) An analysis of the
				  effectiveness and feasibility of control measures that could reduce
				  Cryptosporidium loading from sources of contamination to the supply's source
				  water.
(iv) A statement of goals
				  and specific actions the supply will undertake to reduce source water
				  Cryptosporidium levels. The plan shall explain how the actions are expected to
				  contribute to specific goals, identify watershed partners and their roles,
				  identify resource requirements and commitments, and include a schedule for plan
				  implementation with deadlines for completing specific actions identified in the
				  plan.
(c) Subpart H
				  supplies with existing watershed control programs, that is, programs in place
				  on the effective date of this rule, are eligible to seek this credit. Their
				  watershed control plans shall meet the criteria in subdivision (b) of this
				  subrule and shall specify ongoing and future actions that will reduce source
				  water Cryptosporidium levels.
(d)
				  If the department does not respond to a Subpart H supply regarding approval of
				  a watershed control plan submitted under this rule and the supply meets the
				  other requirements of this rule, the watershed control program will be
				  considered approved and 0.5-log Cryptosporidium treatment credit will be
				  awarded unless the department subsequently withdraws that approval.
(e) Subpart H supplies shall complete all of
				  the following actions to maintain the 0.5-log credit:
(i) Submit an annual watershed control
				  program status report to the department. The annual watershed control program
				  status report shall describe the supply's implementation of the approved plan
				  and assess the adequacy of the plan to meet its goals. It shall explain how the
				  supply is addressing any shortcomings in plan implementation, including those
				  previously identified by the department or as the result of the watershed
				  survey conducted under paragraph (ii) of this subdivision. It shall also
				  describe the significant changes that have occurred in the watershed since the
				  last watershed sanitary survey. If a supply determines during implementation
				  that making a significant change to its approved watershed control program is
				  necessary, the supply shall notify the department before making the changes. If
				  a change is likely to reduce the level of source water protection, the supply
				  shall also list in its notification the actions the supply will take to
				  mitigate this effect.
(ii) Undergo
				  a watershed sanitary survey every 3 years for community water supplies and
				  every 5 years for noncommunity water supplies and submit the survey report to
				  the department. The survey shall be conducted according to department
				  guidelines and by persons the department approves. Both of the following apply
				  to watershed sanitary surveys:
(A) The
				  watershed sanitary survey shall encompass the region identified in the
				  department-approved watershed control plan as the area of influence; assess the
				  implementation of actions to reduce source water Cryptosporidium levels; and
				  identify the significant new sources of Cryptosporidium.
(B) If the department determines that
				  significant changes may have occurred in the watershed since the previous
				  watershed sanitary survey, supplies shall undergo another watershed sanitary
				  survey by a date the department requires, which may be earlier than the regular
				  date in this subdivision.
(iii) The supply shall make the watershed
				  control plan, annual status reports, and watershed sanitary survey reports
				  available to the public upon request. These documents shall be in a plain
				  language style and include criteria by which to evaluate the success of the
				  program in achieving plan goals. The department may approve supplies to
				  withhold from the public portions of the annual status report, watershed
				  control plan, and watershed sanitary survey based on water supply security
				  considerations.
(f) If
				  the department determines that a Subpart H supply is not carrying out the
				  approved watershed control plan, the department may withdraw the watershed
				  control program treatment credit.