Michigan Administrative Code › Department - Environmental Quality › Drinking Water And Municipal Assistance Division › Supplying Water to the Public › Part 7 - SURVEILLANCE, INSPECTION, AND MONITORING › Section R. 325.10710d - Reporting requirements for lead, copper, and corrosion control

Current through Vol. 24-12, July 15, 2024
Rule 710d.
This rule applies to all community and nontransient
					 noncommunity water supplies. These public water supplies are also considered
					 "water supplies" or "supplies" in this rule. Supplies shall report all of the
					 following information to the department:
(a) Reporting provisions for tap water
				  monitoring for lead and copper and for water quality parameter monitoring are
				  as follows:
(i) Except as provided in
				  subparagraph (G) of this paragraph, a water supply shall report the information
				  specified in this paragraph for all tap water samples specified in
				  R 325.10710a and for all water
				  quality parameter samples specified in
				  R 325.10710b within the first 10
				  days after the end of each applicable monitoring period specified in
				  R 325.10710a and
				  R 325.10710b, for example, every 6
				  months, annually, every 3 years, or every 9 years. For monitoring periods with
				  a duration less than 6 months, the end of the monitoring period is the last
				  date samples can be collected during that period as specified in
				  R 325.10710a to
				  R 325.10710b. All of the following
				  apply:
(A) The results of all tap samples for
				  lead and copper, including the location of each site and the criteria in
				  R 325.10710a(1)(c), (d), (e), (f), or
				  (g) used to select the site for the system's
				  sampling pool.
(B) Documentation
				  for each tap water lead or copper sample for which the water supply requests
				  invalidation under
				  R
				  325.10710a(6)(b).
(C)The ninetieth percentile lead and copper
				  concentrations measured from among all lead and copper tap water samples
				  collected during each monitoring period, calculated in compliance with the
				  provisions of
				  R
				  325.10604f(1)(c)(i), unless the
				  department calculates the system's ninetieth percentile lead and copper levels
				  under subdivision (h) of this subrule.
(D) With the exception of initial tap
				  sampling conducted under
				  R
				  325.10710a(4)(a), a water supply
				  shall designate sites not sampled during previous monitoring periods and
				  include an explanation of why sampling sites have changed.
(E) The results of all tap samples for pH
				  and, where applicable, alkalinity, calcium, conductivity, temperature, and
				  orthophosphate or silica collected under
				  R 325.10710b(b) to
				  (e).
(F) The results of all samples collected at
				  the entry point or points to the distribution system for applicable water
				  quality parameters under
				  R 325.10710b(b) to
				  (e).
(G) A water supply shall report the results
				  of all water quality parameter samples collected under
				  R 325.10710b(5) to
				  (8) during each 6-month monitoring period
				  specified in
				  R 325.10710b(6)
				  within the first 10 days following the end of the monitoring period, unless the
				  department has specified a more frequent reporting requirement.