Public water system · SD4602023
ActiveMaxwell Colony
At a glance
Maxwell Colony (PWSID SD4602023) is an active community water system in Bon Homme County, South Dakota. It reports serving 150 people through 34 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
34
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Maxwell Colony compare with other water systems in Bon Homme County?
By EPA's size categories, Maxwell Colony is a very small system (500 people or fewer). Bon Homme County has 7 active public water systems. Its population served is well below the county average of 2,627 people per system, and accounts for 0.8% of the 18,388 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 Maxwell Colony 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 431 South Dakota systems (62%) list groundwater as their primary source.
Who owns and regulates Maxwell Colony?
EPA lists Maxwell Colony as privately owned. 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. 1 of the 7 active systems in Bon Homme County (14%) are also privately owned.
Does Maxwell Colony have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025. The violations listed here began between January 2018 and July 2025. By type: 10 monitoring and reporting, 1 monitoring and 1 required treatment not met. The contaminants or rules involved are Revised Total Coliform Rule, Stage 1 Disinfectants and Disinfection Byproducts Rule, Mercury and Selenium. EPA lists 12 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 |
|---|---|---|---|---|
| 2025-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-11-29 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
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.
Maxwell Colony: frequently asked questions
Who runs Maxwell Colony?
Maxwell Colony (PWSID SD4602023) is a community water system privately owned. It is regulated by the SD state drinking water program.
How many people does Maxwell Colony serve?
Maxwell Colony reports serving 150 people through 34 service connections in Bon Homme County, South Dakota.
Where does Maxwell Colony 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 Maxwell Colony have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2025. 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 Maxwell Colony'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, one is health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Maxwell Colony's water quality report?
As a community water system, Maxwell Colony 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 Bon Homme County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| By Water District | Bon Homme + 6 more | 13,320 | Community | Surface water |
| Springfield | Bon Homme | 2,108 | Community | Surface water |
| Tyndall | Bon Homme | 1,012 | Community | Purchased surface water |
| Scotland | Bon Homme | 785 | Community | Purchased surface water |
| Avon | Bon Homme | 590 | Community | Purchased surface water |
| Tabor | Bon Homme | 423 | Community | Purchased surface water |
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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, “Maxwell Colony, PWSID SD4602023, South Dakota”, https://aquacensus.com/water-systems/south-dakota/maxwell-colony-sd4602023 (data as of October 1, 2026).