Public water system · WI7340120
ActiveU S F S Ada Lake L7 Old Pump
At a glance
U S F S Ada Lake L7 Old Pump (PWSID WI7340120) is an active transient non-community water system in Langlade County, Wisconsin. It reports serving 50 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in January 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does U S F S Ada Lake L7 Old Pump compare with other water systems in Langlade County?
By EPA's size categories, U S F S Ada Lake L7 Old Pump is a very small system (500 people or fewer). Langlade County has 117 active public water systems. Its population served is well below the county average of 165 people per system, and accounts for 0.3% of the 19,356 people reported by systems filed under the county. Across Wisconsin, the 11,056 active systems average 469 people each. Nationally, the average active transient non-community water system reports serving 144 people, so U S F S Ada Lake L7 Old Pump is about 65% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Wisconsin has 9,112 active transient non-community water systems, 82% 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 U S F S Ada Lake L7 Old Pump?
EPA lists U S F S Ada Lake L7 Old Pump as owned by the federal 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. 2 of the 117 active systems in Langlade County (1.7%) are also owned by the federal government.
Does U S F S Ada Lake L7 Old Pump have drinking water violations?
EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in January 2015. The violations listed here began between September 1997 and January 2015. By type: 4 contaminant level above the legal limit, 3 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2015-01-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2015-01-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-01-01 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2011-08-03 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2011-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2000-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1997-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 8 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.
U S F S Ada Lake L7 Old Pump: frequently asked questions
Who runs U S F S Ada Lake L7 Old Pump?
U S F S Ada Lake L7 Old Pump (PWSID WI7340120) is a transient non-community water system owned by the federal government. It is regulated by the WI state drinking water program.
How many people does U S F S Ada Lake L7 Old Pump serve?
U S F S Ada Lake L7 Old Pump reports serving 50 people through 1 service connection in Langlade County, Wisconsin.
Where does U S F S Ada Lake L7 Old Pump 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 U S F S Ada Lake L7 Old Pump have any drinking water violations?
EPA's records list 8 violations for this system; 5 are health-based, and the most recent began in January 2015. 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 U S F S Ada Lake L7 Old Pump'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 8 violations for this system; 5 are health-based, and the most recent began in January 2015. For current results, consult EPA ECHO, or the WI state drinking water program.
Where can I find U S F S Ada Lake L7 Old Pump's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. U S F S Ada Lake L7 Old Pump is a 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 Langlade County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Antigo Waterworks | Langlade | 7,780 | Community | Groundwater |
| Northwoods Inn | Langlade | 700 | Transient non-community | Groundwater |
| Scouting America Camp Mkjw East Camp 1 | Langlade | 650 | Transient non-community | Groundwater |
| Scouting America Mkjw West Camp 2 | Langlade | 450 | Transient non-community | Groundwater |
| Scouting America Camp Mkjw West Camp 1 | Langlade | 450 | Transient non-community | Groundwater |
| Silver Birch Ranch Dorms | Langlade | 422 | Transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “U S F S Ada Lake L7 Old Pump, PWSID WI7340120, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/u-s-f-s-ada-lake-l7-old-pump-wi7340120 (data as of October 1, 2026).