NR 809.336(1) (1) Water suppliers shall report results from the source water monitoring required under s. NR 809.331 (1) and (2) no later than 10 days after the end of the first month following the month when the sample is collected.

NR 809.336(1)(a) (a) All water suppliers for public water systems serving at least 10,000 people shall report the results from the initial source water monitoring required under s. NR 809.331 (1) to EPA.

NR 809.336(1)(b) (b) If a water supplier is unable to report monitoring results electronically, the water supplier may use an alternative approach for reporting monitoring results that EPA approves.

NR 809.336(2) (2) Water suppliers for public water systems serving fewer than 10,000 people shall report results from the initial source water monitoring required under s. NR 809.331 (1) to the department.

NR 809.336(3) (3) All water suppliers shall report results from the second round of source water monitoring required under s. NR 809.331 (2) to the department.

NR 809.336(4) (4) Water suppliers shall report the applicable information in pars. (a) and (b) for the source water monitoring required under s. NR 809.331 (1) and (2).

NR 809.336(4)(a) (a) Water suppliers shall report the following data elements for each Cryptosporidium analysis:

- See PDF for table

NR 809.336(4)(a)1. 1. For matrix spike samples, water suppliers shall also report the sample volume spiked and estimated number of oocysts spiked. These data are not required for field samples.

NR 809.336(4)(a)2. 2. For samples in which less than 10 L is filtered or less than 100% of the sample volume is examined, water suppliers shall also report the number of filters used and the packed pellet volume.

NR 809.336(4)(a)3. 3. For samples in which less than 100% of sample volume is examined, water suppliers shall also report the volume of resuspended concentrate and volume of this resuspension processed through immunomagnetic separation.

NR 809.336(4)(b) (b) Water suppliers shall report the following data elements for each E. coli analysis:

- See PDF for table

NR 809.336(4)(c) (c) Water suppliers for public water systems serving fewer than 10,000 people that are not required to monitor for turbidity under s. NR 809.331 (1) and (2) are not required to report turbidity with their E. coli results.

NR 809.336 History History: CR 09-073: cr. Register November 2010 No. 659, eff. 12-1-10; correction in (1) (a) made under s. 13.92 (4) (b) 6., Stats., Register January 2013 No. 685; CR 15-049: am. (4) (b) Register March 2016 No. 723, eff. 4-1-16.

NR 809.35 NR 809.35 Sanitary survey requirements for all public water systems.

NR 809.35(1) (1) Sanitary surveys.

NR 809.35(1)(a) (a) Community water systems shall undergo a sanitary survey every 3 years, unless the public water system meets the requirements of sub. (2) for outstanding performance of a public water system, then a sanitary survey may be conducted every 5 years.

NR 809.35(1)(b) (b) Non-community water systems shall undergo a sanitary survey every 5 years.

NR 809.35(1)(c) (c) The department will review the results of each sanitary survey to determine whether the existing monitoring frequency is adequate and what additional measures, if any, the water supplier needs to undertake to improve drinking water quality.

NR 809.35(1)(d) (d) Sanitary surveys shall be performed by the department or an agent approved by the department. If the department requests a water supplier to have a sanitary survey performed, the water supplier is responsible for ensuring the survey is completed.

NR 809.35(2) (2) Outstanding performance.

NR 809.35(2)(a) (a) At the discretion of the department, community water systems may be designated as demonstrating outstanding performance and eligible for a reduced frequency of sanitary surveys. For community water systems determined by the department to have outstanding performance based on prior sanitary surveys, subsequent sanitary surveys may be conducted no less than every five years. The following criteria shall be used to determine outstanding performance:

NR 809.35(2)(a)1. 1. No violations of MCLs since the last sanitary survey.

NR 809.35(2)(a)2. 2. No violations of monitoring and reporting requirements since the last sanitary survey.

NR 809.35(2)(a)3. 3. No violations of primary drinking water regulations during the past five years or similar time period.

NR 809.35(2)(a)4. 4. No significant deficiencies shall have been identified in the current sanitary survey or the previous sanitary survey.

NR 809.35(2)(a)5. 5. Existence of emergency preparedness measures and backup facilities.

NR 809.35(2)(a)6. 6. Expert operation and management of the public water system, for example, skilled, certified personnel in adequate numbers, existence of quality O&M manuals that are used by the staff; adequate budget and revenues.