Public water system · WI8160147
ActiveSuperior Water Light & Power Company
At a glance
Superior Water Light & Power Company (PWSID WI8160147) is an active community water system in Douglas County, Wisconsin. It reports serving 26,084 people through 9,660 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
26,084
Service connections
9,660
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Superior Water Light & Power Company compare with other water systems in Douglas County?
By EPA's size categories, Superior Water Light & Power Company is a large system (10,001 to 100,000 people). Douglas County has 188 active public water systems, and Superior Water Light & Power Company is the largest of them by population served. Its population served is about 142 times the county average of 184 people per system, and accounts for 75% of the 34,606 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active community water system reports serving 6,703 people, so Superior Water Light & Power Company is about 3.9 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Wisconsin has 1,053 active community water systems, 9.5% of the state's 11,056 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 20 Wisconsin systems (0.2%) list surface water as their primary source.
Who owns and regulates Superior Water Light & Power Company?
EPA lists Superior Water Light & Power Company as privately owned. The WI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 150 of the 188 active systems in Douglas County (80%) are also privately owned.
Does Superior Water Light & Power Company have drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2024. The violations listed here began between July 1995 and October 2024. By type: 5 monitoring and reporting, 2 required treatment not met, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (2 of them). EPA lists 8 as resolved and 1 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2024-10-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2018-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2008-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 1996-01-01 | Required treatment not metOCCT/SOWT Study/Recommendation · code 57 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 1995-07-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
All 9 violations in EPA's records, newest first. Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Superior Water Light & Power Company: frequently asked questions
Who runs Superior Water Light & Power Company?
Superior Water Light & Power Company (PWSID WI8160147) is a community water system privately owned. It is regulated by the WI state drinking water program.
How many people does Superior Water Light & Power Company serve?
Superior Water Light & Power Company reports serving 26,084 people through 9,660 service connections in Douglas County, Wisconsin.
Where does Superior Water Light & Power Company get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Superior Water Light & Power Company have any drinking water violations?
EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2024. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Superior Water Light & Power Company's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 9 violations for this system; 3 are health-based, and the most recent began in October 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Superior Water Light & Power Company's water quality report?
As a community water system, Superior Water Light & Power Company must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Douglas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Northwestern Elementary and Middle School | Douglas | 890 | Non-transient non-community | Groundwater |
| Northwestern High School | Douglas | 448 | Non-transient non-community | Groundwater |
| Solon Springs School | Douglas | 375 | Non-transient non-community | Groundwater |
| Four Corners Elementary School | Douglas | 300 | Non-transient non-community | Groundwater |
| Parkland Town Hall | Douglas | 230 | Transient non-community | Groundwater |
| Bridges Bar | Douglas | 200 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Superior Water Light & Power Company, PWSID WI8160147, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/superior-water-light-power-company-wi8160147 (data as of October 1, 2026).