Public water system · WI6270004
ActiveNorthfield San Dist 1
At a glance
Northfield San Dist 1 (PWSID WI6270004) is an active community water system in Jackson County, Wisconsin. It reports serving 50 people through 38 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in May 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
38
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Northfield San Dist 1 compare with other water systems in Jackson County?
By EPA's size categories, Northfield San Dist 1 is a very small system (500 people or fewer). Jackson County has 106 active public water systems. Its population served is well below the county average of 188 people per system, and accounts for 0.3% of the 19,930 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 Northfield San Dist 1 is well below 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. 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 Northfield San Dist 1?
EPA lists Northfield San Dist 1 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. 26 of the 106 active systems in Jackson County (25%) are also owned by a local government.
Does Northfield San Dist 1 have drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in May 2022. The violations listed here began between July 2002 and May 2022. By type: 7 monitoring and reporting and 2 required treatment not met. The contaminant or rule involved most often is Stage 1 Disinfectants and Disinfection Byproducts Rule (2 of them). EPA lists 9 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2022-05-02 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2021-02-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-02-12 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2002-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | 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.
Northfield San Dist 1: frequently asked questions
Who runs Northfield San Dist 1?
Northfield San Dist 1 (PWSID WI6270004) is a community water system owned by a local government. It is regulated by the WI state drinking water program.
How many people does Northfield San Dist 1 serve?
Northfield San Dist 1 reports serving 50 people through 38 service connections in Jackson County, Wisconsin.
Where does Northfield San Dist 1 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 Northfield San Dist 1 have any drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in May 2022. 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 Northfield San Dist 1'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; 2 are health-based, and the most recent began in May 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the WI state drinking water program.
Where can I find Northfield San Dist 1's water quality report?
As a community water system, Northfield San Dist 1 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 Jackson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Black River Falls Waterworks | Jackson | 3,608 | Community | Groundwater |
| Brockway Sanitary Dist 1 | Jackson | 2,692 | Community | Groundwater |
| Wi Dot Rest Area 54 Westbound | Jackson | 2,200 | Transient non-community | Groundwater |
| Wi Dot Rest Area 53 Eastbound | Jackson | 2,090 | Transient non-community | Groundwater |
| Melrose Mindoro United Campus | Jackson | 800 | Non-transient non-community | Groundwater |
| Merrillan Waterworks | Jackson | 531 | 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, “Northfield San Dist 1, PWSID WI6270004, Wisconsin”, https://aquacensus.com/water-systems/wisconsin/northfield-san-dist-1-wi6270004 (data as of October 1, 2026).