Wisconsin Administrative Code › Department of Natural Resources › NR 800 - Environmental Protection - Water Supply › Chapter NR 809 - Safe Drinking Water › Subchapter II - Control of Lead and Copper › Section NR 809.547 - Monitoring requirements for lead and copper in tap water

Current through June 24, 2024
(1) SAMPLE SITE
				  LOCATION.
(a) By the applicable date for
				  commencement of monitoring under sub. (4) (a), each water supplier shall
				  complete a materials evaluation of the distribution system of this public water
				  system in order to identify a pool of targeted sampling sites that meet the
				  requirements as specified in pars. (c) to (f), and which is sufficiently large
				  to ensure that the water supplier can collect the number of lead and copper tap
				  samples required in sub. (3). All sites from which first draw samples are
				  collected shall be selected from this pool of targeted sampling sites. Sampling
				  sites may not include faucets that have point-of-use or point-of-entry
				  treatment devices designed to remove inorganic contaminants.
(b) A water supplier shall use the
				  information on lead, copper and galvanized steel that they are required to
				  collect under s.
				  NR
				  809.119 when conducting a materials evaluation. When
				  an evaluation of the information collected pursuant to s.
				  NR
				  809.119(4) is insufficient to locate
				  the requisite number of lead and copper sampling sites that meet the targeting
				  criteria in this subsection, the water supplier shall review the following
				  sources of information in order to identify a sufficient number of sampling
				  sites. In addition, the water supplier shall seek to collect such information
				  where possible in the course of its normal operations, including, checking
				  service line materials when reading water meters or performing maintenance
				  activities:
1. All plumbing codes, permits and
				  records in the files of the building department which indicate the plumbing
				  materials that are installed within publicly and privately owned structures
				  connected to the distribution system.
2. All inspections and records of the
				  distribution system that indicate the material composition of the service
				  connections that connect a structure to the distribution system.
3. All existing water quality information,
				  which includes the results of all prior analyses of the public water system or
				  individual structures connected to the public water system, indicating
				  locations that may be particularly susceptible to high lead or copper
				  concentrations.
(c) The
				  "tier 1 sampling sites" selected for a community water system's sampling pool
				  shall consist of single family structures that meet at least one of the
				  following requirements:
1. Contain copper
				  pipes with lead solder installed after 1982 or contain lead pipes.
2. Are served by a lead service
				  line.
(d) When
				  multiple-family residences comprise at least 20% of the structures served by a
				  public water system, the water supplier may include the types of structures
				  described in par. (c) in its sampling pool.
(e) Any water supplier for a community water
				  system with insufficient tier 1 sampling sites shall complete the sampling pool
				  with "tier 2 sampling sites," consisting of buildings, including
				  multiple-family residences that meet at least one of the following
				  requirements:
1. Contain copper pipes with
				  lead solder installed after 1982 or contain lead pipes.
2. Are served by a lead service
				  line.
(f) Any water
				  supplier for a community water system with insufficient tier 1 and tier 2
				  sampling sites shall complete the sampling pool with "tier 3 sampling sites",
				  consisting of single family structures that contain copper pipes with lead
				  solder installed before 1983. A water supplier for a community water system
				  with insufficient tier 1, tier 2 and tier 3 sampling sites shall complete its
				  sampling pool with representative sites throughout the distribution system. For
				  the purpose of this paragraph, a representative site is a site at which the
				  plumbing materials used at that site would be commonly found at other sites
				  served by the public water system.
(g) The "tier one sampling sites" selected
				  for a non-transient non-community water system shall consist of buildings that
				  meet at least one of the following requirements:
1. Contain copper pipes with lead solder
				  installed after 1982 or contain lead pipes.
2. Are served by a lead service
				  line.
(h) A water
				  supplier for a non-transient, non-community water system with insufficient tier
				  1 sites that meet the targeting criteria in par. (g) shall complete their
				  sampling pool with sampling sites that contain copper pipes with lead solder
				  installed before 1983. If additional sites are needed to complete the sampling
				  pool, the water supplier shall use representative sites throughout the
				  distribution system. For the purpose of this paragraph, a representative site
				  is a site at which the plumbing materials used at that site would be commonly
				  found at other sites served by the public water system.
(i) Any water supplier whose distribution
				  system contains lead service lines shall draw 50% of the samples collected
				  during each monitoring period from sites that contain lead pipes, or copper
				  pipes with lead solder, and 50% of those samples from sites served by a lead
				  service line. A water supplier who cannot identify a sufficient number of
				  sampling sites served by a lead service line shall collect first draw samples
				  from all of the sites identified as being served by such lines.