Public water system · SD4600166
ActiveHudson
At a glance
Hudson (PWSID SD4600166) is an active community water system in Lincoln County, South Dakota. It reports serving 332 people through 163 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
332
Service connections
163
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Hudson compare with other water systems in Lincoln County?
By EPA's size categories, Hudson is a very small system (500 people or fewer). Lincoln County has 9 active public water systems. Its population served is well below the county average of 3,986 people per system, and accounts for 0.9% of the 35,871 people reported by systems filed under the county. Across South Dakota, the 699 active systems average 1,387 people each. Nationally, the average active community water system reports serving 6,703 people, so Hudson 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. South Dakota has 510 active community water systems, 73% of the state's 699 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 100 South Dakota systems (14%) list purchased groundwater as their primary source.
Who owns and regulates Hudson?
EPA lists Hudson as owned by a local government. The SD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 9 active systems in Lincoln County (67%) are also owned by a local government.
Does Hudson have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 2000. The violations listed here began between July 1976 and July 2000. By type: 6 public notice, recordkeeping or other, 3 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 7 as archived and 5 as resolved. 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. 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 |
|---|---|---|---|---|
| 2000-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1991-12-18 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1991-12-17 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1991-12-16 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1991-10-10 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1991-09-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1991-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-05-06 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1991-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | 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.
Hudson: frequently asked questions
Who runs Hudson?
Hudson (PWSID SD4600166) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Hudson serve?
Hudson reports serving 332 people through 163 service connections in Lincoln County, South Dakota.
Where does Hudson get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Hudson have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in July 2000. 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 Hudson'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, 3 are health-based, and the most recent began in July 2000. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Hudson's water quality report?
As a community water system, Hudson 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 Lincoln County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Harrisburg | Lincoln | 10,297 | Community | Purchased groundwater |
| Tea | Lincoln | 7,381 | Community | Purchased groundwater |
| Lincoln County Rural Water System | Lincoln + 1 more | 5,965 | Community | Purchased groundwater |
| South Lincoln Rural Water System | Lincoln + 2 more | 5,250 | Community | Groundwater |
| Canton | Lincoln | 3,066 | Community | Groundwater |
| Lennox | Lincoln | 2,571 | Community | Purchased 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, “Hudson, PWSID SD4600166, South Dakota”, https://aquacensus.com/water-systems/south-dakota/hudson-sd4600166 (data as of October 1, 2026).