Wisconsin Administrative Code
Department of Natural Resources
NR 800 - Environmental Protection - Water Supply
Chapter NR 810 - Requirements for the operation and maintenance of public water systems
Subchapter III - Toolbox Options for Meeting Enhanced Treatment for Cryptosporidium Requirements
Section NR 810.42 - Source toolbox components
Universal Citation: WI Admin Code ยง NR 810.42
Current through August 26, 2024
(1) WATERSHED CONTROL PROGRAM. Systems receive 0.5 -log Cryptosporidium treatment credit for implementing a watershed control program that meets the requirements of this section.
(a) Water suppliers for systems that
intend to apply for the watershed control program credit shall notify the
department of this intent no later than 2 years prior to the treatment
compliance date applicable to the system in s.
NR 810.37.
(b) Water suppliers for systems shall submit
to the department a proposed watershed control plan no later than one year
before the applicable treatment compliance date in s.
NR 810.37. The department shall approve the watershed
control plan for the system to receive watershed control program treatment
credit. The watershed control plan shall include the following elements:
1. Identification of an "area of influence"
outside of which the likelihood of Cryptosporidium or fecal contamination
affecting the treatment plant intake is not significant. The area of influence
is the area to be evaluated in future watershed surveys under subd.
2.
2. Identification of both
potential and actual sources of Cryptosporidium contamination and an assessment
of the relative impact of these sources on the system's source water
quality.
3. An analysis of the
effectiveness and feasibility of control measures that could reduce
Cryptosporidium loading from sources of contamination to the system's source
water.
4. A statement of goals and
specific actions the system 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) Public water
systems with existing watershed control programs in place on or before January
5, 2006, are eligible to seek this credit. The watershed control plans shall
meet the criteria in par. (b) and shall specify ongoing and future actions that
will reduce source water Cryptosporidium levels.
(d) If the department does not respond to a
water supplier regarding approval of a watershed control plan submitted under
this section and the system meets the other requirements of this section, the
watershed control program will be considered approved and 0.5 log
Cryptosporidium treatment credit will be awarded unless and until the
department subsequently withdraws the approval.
(e) Systems shall complete the following
actions to maintain the 0.5-log credit:
1.
Submit an annual watershed control program status report to the department. The
annual watershed control program status report shall describe the system's
implementation of the approved plan and assess the adequacy of the plan to meet
its goals. The status report shall explain how the system is addressing any
shortcomings in plan implementation, including those previously identified by
the department or as the result of the watershed survey conducted under subd.
2. It shall also describe any significant changes that have occurred in the
watershed since the last watershed sanitary survey. If a system determines
during implementation that making a significant change to its approved
watershed control program is necessary, the water supplier shall notify the
department prior to making any changes. If any change is likely to reduce the
level of source water protection, the water supplier shall also list in this
notification the actions the system will take to mitigate this
effect.
2. Undergo a watershed
sanitary survey every 3 years for community water systems and every 5 years for
noncommunity water systems and submit the survey report to the department. The
survey shall be conducted according to department guidelines and by persons the
department approves.
a. The watershed sanitary
survey shall meet the following criteria: 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 any 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, systems shall undergo another watershed sanitary
survey by a date the department requires, which may be earlier than the regular
date in this subdivision.
3. The water supplier for the system 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.
(f) If the department determines that a
system is not complying with the approved watershed control plan, the
department may withdraw the watershed control program treatment
credit.
(2) ALTERNATIVE SOURCE.
(a) A water supplier for a system may
conduct source water monitoring that reflects a different intake location,
either in the same source or for an alternate source, or a different procedure
for the timing or level of withdrawal from the source (alternative source
monitoring). If the department approves, a water supplier for that system may
determine its bin classification under s.
NR 810.34 base don the alternative source monitoring
results.
(b) If water suppliers for
systems conduct alternative source monitoring under this subsection, water
suppliers shall also monitor the current plant intake for the system
concurrently as described in s.
NR 809.331.
(c) Alternative source monitoring under par.
(a) shall meet the requirements for source monitoring to determine bin
classification, as described in ss.
NR 809.331 to 809.336. Water suppliers shall report
the alternative source monitoring results to the department, along with
supporting information documenting the operating conditions under which the
samples were collected.
(d) If the
water supplier for a system determines the system bin classification under s.
NR 810.34 using alternative source monitoring results
that reflect a different intake location or a different procedure for managing
the timing or level of withdrawal from the source, the system shall relocate
the intake or permanently adopt the withdrawal procedure, as applicable, no
later than the applicable treatment compliance date in s.
NR 810.37.
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