Public water system · WI4151199
ActiveGibraltar High School
At a glance
Gibraltar High School (PWSID WI4151199) is an active non-transient non-community water system in Door County, Wisconsin. It reports serving 695 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 1995.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
695
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Gibraltar High School compare with other water systems in Door County?
By EPA's size categories, Gibraltar High School is a small system (501 to 3,300 people). Door County has 451 active public water systems, and Gibraltar High School is the 5th-largest of them by population served. Its population served is about 9 times the county average of 77 people per system, and accounts for 2% of the 34,679 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Gibraltar High School is about 62% above that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Wisconsin has 891 active non-transient non-community water systems, 8.1% of the state's 11,056 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 10,978 Wisconsin systems (99%) list groundwater as their primary source.
Who owns and regulates Gibraltar High School?
EPA lists Gibraltar High School as owned by a local government. 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. 45 of the 451 active systems in Door County (10%) are also owned by a local government.
Does Gibraltar High School have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 1995. The violations listed here began between January 1995 and July 1995. By type: 12 monitoring and reporting. The contaminants or rules involved are Total coliform bacteria (TCR), Nickel, Fluoride and Nitrate. EPA lists 12 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1995-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Archived |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Archived |
The 12 most recent 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.
Gibraltar High School: frequently asked questions
Who runs Gibraltar High School?
Gibraltar High School (PWSID WI4151199) is a non-transient non-community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Gibraltar High School serve?
Gibraltar High School reports serving 695 people through 1 service connection in Door County, Wisconsin.
Where does Gibraltar High School get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Gibraltar High School have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 1995. 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 Gibraltar High School'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in July 1995. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find Gibraltar High School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Gibraltar High School is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Door County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sturgeon Bay Waterworks | Door | 9,700 | Community | Groundwater |
| Southern Door Sch Dist | Door | 1,350 | Non-transient non-community | Groundwater |
| Sister Bay Waterworks | Door | 1,000 | Community | Groundwater |
| Sevastopol High Sch | Door | 715 | Non-transient non-community | Groundwater |
| Loft | Door | 308 | Transient non-community | Groundwater |
| Culvers Town & Country C Store | Door | 265 | 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, “Gibraltar High School, PWSID WI4151199, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/gibraltar-high-school-wi4151199 (data as of October 1, 2026).