NR 809.83(2)(a) (a) Each existing community water system shall deliver its report by July 1 annually. Reports shall contain data collected during, or prior to, the previous calendar year.

NR 809.83(2)(b) (b) A new community water system shall deliver its first report by July 1 of the year after its first full calendar year in operation and annually thereafter.

NR 809.83(2)(c) (c) A community water system that sells water to another community water system shall deliver the applicable information required in s. NR 809.833 to the buyer system by one of the following dates:

NR 809.83(2)(c)1. 1. No later than April 1 annually.

NR 809.83(2)(c)2. 2. On a date mutually agreed upon by the seller and the purchaser, and specifically included in a contract between the parties.

NR 809.83 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; CR 15-049: am. (1) (b) Register March 2016 No. 723, eff. 4-1-16.

NR 809.833 NR 809.833 Content of consumer confidence reports. Water suppliers for each community water system shall provide to their customers an annual report that contains all of the information specified in this section and s. NR 809.835.

NR 809.833(1) (1) Information on the source of the water delivered. Each report shall identify the sources of the water delivered by the community water system by providing information on all of the following:

NR 809.833(1)(a) (a) The type of the water, including, surface water, groundwater.

NR 809.833(1)(b) (b) The commonly used name, if any, and location of the bodies of water.

NR 809.833(1)(c) (c) If a source water assessment has been completed, the report shall notify consumers of the availability of this information and the means to obtain it. In addition, water suppliers are encouraged to highlight in the report significant sources of contamination in the source water area if they have readily available information. If a public water system has received a source water assessment from the department, the report shall include a brief summary of the public water system’s susceptibility to potential sources of contamination, using language provided by the department or written by the water suppliers.

NR 809.833(2) (2) Definitions.

NR 809.833(2)(a) (a) Each report shall include all of the following definitions:

NR 809.833(2)(a)1. 1. Maximum contaminant level goal or MCLG: The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety.

NR 809.833(2)(a)2. 2. Maximum contaminant level or MCL: The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.

NR 809.833(2)(b) (b) A report for a community water system operating under a variance or an exemption issued under subch. VI shall include the following definition, “Variances and Exemptions: state or EPA permission not to meet an MCL or a treatment technique under certain conditions.”

NR 809.833(2)(c) (c) A report which contains data on contaminants which EPA regulates using any of the following terms shall include the applicable definitions:

NR 809.833(2)(c)1. 1. “Treatment technique: A required process intended to reduce the level of a contaminant in drinking water.”

NR 809.833(2)(c)2. 2. “Action level: The concentration of a contaminant which, if exceeded, triggers treatment or other requirements which a public water system shall follow.”

NR 809.833(2)(c)3. 3. “Maximum residual disinfectant level goal or MRDLG: The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.”

NR 809.833(2)(c)4. 4. “Maximum residual disinfectant level or MRDL: The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.”

NR 809.833(2)(d) (d) A report that contains information regarding a Level 1 or Level 2 Assessment required in s. NR 809.313 shall include the following definitions:

NR 809.833(2)(d)1. 1. “Level 1 Assessment: A Level 1 assessment is a study of the water system to identify potential problems and determine, if possible, why total coliform bacteria have been found in our water system.”

NR 809.833(2)(d)2. 2. “Level 2 Assessment: A Level 2 assessment is a very detailed study of the water system to identify potential problems and determine, if possible, why an E. coli MCL violation has occurred or why total coliform bacteria have been found in our water system, or both, on multiple occasions.”

NR 809.833(3) (3) Information on detected contaminants. With the exception of Cryptosporidium, reports shall contain the following information in the specified format, for regulated contaminants subject to a MCL, action level, maximum residual disinfectant level, microbial contaminants, or treatment technique, unregulated contaminants for which monitoring is required under subch. I, and disinfection by-products for which monitoring is required under subch. III:

NR 809.833(3)(a) (a) The data relating to these contaminants shall be displayed in one table or in several adjacent tables. Any additional monitoring results which a water supplier chooses to include in its report shall be displayed separately.

NR 809.833(3)(b) (b) The data shall be derived from data collected to comply with EPA and department monitoring and analytical requirements during calendar year 1998 for the first report and subsequent calendar years thereafter except that:

NR 809.833(3)(b)1. 1. If a public water system is allowed to be monitored for regulated contaminants less often than once a year, the tables shall include the date and results of the most recent sampling and the report shall include a brief statement indicating that the data presented in the report are from the most recent testing done in accordance with the regulations. No data older than 5 years need be included.

NR 809.833(3)(b)2. 2. Results of monitoring in compliance with requirements issued under 40 CFR Sub. D, part 141.142 and 141.143 under the information collection rule need only be included for 5 years from the date of last sample or until any of the detected contaminants becomes regulated and subject to routine monitoring requirements, whichever comes first.