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 II - Surface Water Treatment and Groundwater Under the Direct Influence of Surface Water Treatment Operations
Section NR 810.40 - Recordkeeping requirements
Current through August 26, 2024
(1) Public water systems shall keep results from the initial round of source water monitoring under s. NR 809.331(1) and the second round of source water monitoring under s. NR 809.331(2) until 3 years after bin classification under s. NR 810.34 for filtered systems or determination of the mean Cryptosporidium level under s. NR 810.35 for unfiltered GWUDI systems for the particular round of monitoring.
(2) Public water systems shall keep any notification to the department that the systems will not conduct source water monitoring due to meeting the criteria of s. NR 809.331(4) for 3 years from the date of notification.
(3) Public water systems shall keep the results of treatment monitoring associated with microbial toolbox options under ss. NR 810.42 to for 810.463 years from the date of monitoring.
