Wisconsin Department of Natural Resources Drinking Water System Routine Monitoring Requirements Period: 01/01/2026 to 12/31/2026 Subject to change -- based on information provided to DNR as of 10/28/2026 Attachment 1 10/28/2026 07:21:52 PM

If any of the following information has changed, please contact your DNR representative with any corrections:
WEBSTER, ARYN RHINELANDER, WI 54501
Phone: (715) 499-1160 Email: ARYN.WEBSTER@WISCONSIN.GOV

System Name: SUPERIOR WATER LIGHT & POWER COMPANY PWS ID#: 81601476 Population: 26,084

Sampler: OPERATOR IN CHARGE MATT TONN Owner: MANAGER GAS & WATER OPERATIONS TROY AUNE

The following is a table of the routine monitoring required for this water system (additional monitoring may be required based on results of this monitoring). Each row represents a DNR monitoring requirement. Failure to complete a requirement may result in a monitoring violation. Please make sure that you are using the correct lab sheet for each sample, based on the correct time period, sample location and sample group.

Completed? Monitoring Period Sample Source Sample Group # of samples # of contams
COMPLETEJANUARYDistributionColiform Bacteria301
COMPLETEJANUARYDistributionFluoride - Operator/Lab Split11
COMPLETEJANUARYEP 81Total Organic Carbon Finished Water11
COMPLETEJANUARY1 RawTotal Organic Carbon Raw Water12
COMPLETEJANUARY - JUNEDistributionLead and copper602
COMPLETEJANUARY - SEPTEMBEREP 81Inorganics116
COMPLETEJANUARY - SEPTEMBEREP 81Radioactivity - Grab14
COMPLETEJANUARY - SEPTEMBEREP 81Synthetic Organics13
COMPLETEJANUARY - SEPTEMBEREP 81Volatile Organics141
COMPLETEJANUARY 13 - JANUARY 23DistributionDisinfection Byproducts (TTHM, HAA5)411
COMPLETEFEBRUARYDistributionColiform Bacteria301
COMPLETEFEBRUARYDistributionFluoride - Operator/Lab Split11
COMPLETEFEBRUARYEP 81Total Organic Carbon Finished Water11
COMPLETEFEBRUARY1 RawTotal Organic Carbon Raw Water12
COMPLETEMARCHDistributionColiform Bacteria301
COMPLETEMARCHDistributionFluoride - Operator/Lab Split11
COMPLETEMARCHEP 81Total Organic Carbon Finished Water11
COMPLETEMARCH1 RawTotal Organic Carbon Raw Water12
COMPLETEAPRILDistributionColiform Bacteria301
COMPLETEAPRILDistributionFluoride - Operator/Lab Split11
COMPLETEAPRILEP 81Total Organic Carbon Finished Water11
COMPLETEAPRIL1 RawTotal Organic Carbon Raw Water12
COMPLETEAPRIL - JUNEEP 81Synthetic Organics136
COMPLETEAPRIL 13 - APRIL 23DistributionDisinfection Byproducts (TTHM, HAA5)411
COMPLETEMAYDistributionColiform Bacteria301
COMPLETEMAYDistributionFluoride - Operator/Lab Split11
COMPLETEMAYEP 81Total Organic Carbon Finished Water11
COMPLETEMAY1 RawTotal Organic Carbon Raw Water12
COMPLETEJUNEDistributionColiform Bacteria301
COMPLETEJUNEDistributionFluoride - Operator/Lab Split11
COMPLETEJUNEEP 81Total Organic Carbon Finished Water11
COMPLETEJUNE1 RawTotal Organic Carbon Raw Water12
COMPLETEJULYDistributionColiform Bacteria301
COMPLETEJULYDistributionFluoride - Operator/Lab Split11
COMPLETEJULYEP 81Total Organic Carbon Finished Water11
COMPLETEJULY1 RawTotal Organic Carbon Raw Water12
COMPLETEJULY - SEPTEMBEREP 81Synthetic Organics136
COMPLETEJULY - DECEMBERDistributionLead and copper602
COMPLETEJULY 12 - JULY 22DistributionDisinfection Byproducts (TTHM, HAA5)411
COMPLETEAUGUSTDistributionColiform Bacteria301
COMPLETEAUGUSTDistributionFluoride - Operator/Lab Split11
COMPLETEAUGUSTEP 81Total Organic Carbon Finished Water11
COMPLETEAUGUST1 RawTotal Organic Carbon Raw Water12
COMPLETESEPTEMBERDistributionColiform Bacteria301
COMPLETESEPTEMBERDistributionFluoride - Operator/Lab Split11
COMPLETESEPTEMBEREP 81Total Organic Carbon Finished Water11
COMPLETESEPTEMBER1 RawTotal Organic Carbon Raw Water12
COMPLETEOCTOBERDistributionColiform Bacteria301
COMPLETEOCTOBERDistributionFluoride - Operator/Lab Split11
OCTOBEREP 81Total Organic Carbon Finished Water11
OCTOBER1 RawTotal Organic Carbon Raw Water12
COMPLETEOCTOBER - DECEMBER1 RawAmmonia11
COMPLETEOCTOBER 10 - OCTOBER 20DistributionDisinfection Byproducts (TTHM, HAA5)411
NOVEMBERDistributionColiform Bacteria301
NOVEMBERDistributionFluoride - Operator/Lab Split11
NOVEMBEREP 81Total Organic Carbon Finished Water11
NOVEMBER1 RawTotal Organic Carbon Raw Water12
DECEMBERDistributionColiform Bacteria301
DECEMBERDistributionFluoride - Operator/Lab Split11
DECEMBEREP 81Per/Poly-Fluoroalkyls (PFAS)16
DECEMBEREP 81Total Organic Carbon Finished Water11
DECEMBER1 RawTotal Organic Carbon Raw Water12
Waivers:
Asbestos (Inorganic Report Form)1Waiver issued - No sampling required during calendar year 2026
Asbestos (Inorganic Report Form)81Waiver issued - No sampling required during calendar year 2026
Benzo(A)Pyrene (Synthetic Form)1Waiver issued - No sampling required during calendar year 2026
Benzo(A)Pyrene (Synthetic Form)81Waiver issued - No sampling required during calendar year 2026
EDB/DBCP (Synthetic Report Form)81Waiver issued - No sampling required during calendar year 2026