Thompson Oaks
PWSID: MN1740008 · Ellendale, MN · Serves 51 people
According to EPA Safe Drinking Water Information System (SDWIS), Thompson Oaks (PWSID MN1740008) in Ellendale, MN is listed as a CWS water system covering about 51 people. The same extract lists 18 health-based violation records spanning 2016-2025. Those 18 health-based rows for Thompson Oaks cover contaminants such as Gross Alpha, Excl. Radon and U; they remain historical EPA registry entries, not a current compliance or drinkability score.
Thompson Oaks has 18 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Gross Alpha, Excl. Radon and U. Recorded violations span 2016–2025. Day-to-day primacy enforcement for this system runs through the Minnesota drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Minnesota state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- MN1740008
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Ellendale, MN
- Population Served
- 51
- Health Violations
- Yes (18)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Gross Alpha, Excl. Radon and U | 18 | 18 |
Violation History (18)
| Contaminant | Health | Date |
|---|---|---|
| Gross Alpha, Excl. Radon and U | Yes | Oct 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Apr 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Jan 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Oct 1, 2024 |
| Gross Alpha, Excl. Radon and U | Yes | Oct 1, 2024 |
| Gross Alpha, Excl. Radon and U | Yes | Oct 1, 2024 |
| Gross Alpha, Excl. Radon and U | Yes | Jan 1, 2023 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 2020 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 2020 |
| Gross Alpha, Excl. Radon and U | Yes | Apr 1, 2020 |
| Gross Alpha, Excl. Radon and U | Yes | Apr 1, 2020 |
| Gross Alpha, Excl. Radon and U | Yes | Jan 1, 2020 |
| Gross Alpha, Excl. Radon and U | Yes | Jan 1, 2020 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 2019 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 2019 |
| Gross Alpha, Excl. Radon and U | Yes | Jan 1, 2016 |
| Gross Alpha, Excl. Radon and U | Yes | Jan 1, 2016 |
Frequently Asked Questions
What does EPA SDWIS list for Thompson Oaks?
How many people does Thompson Oaks serve?
What violations does Thompson Oaks have?
What contaminants have been found in Thompson Oaks water?
Compare beyond Minnesota
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest Thompson Oaks on cumulative violation count (18) and EPA-reported population served (51). Violation-count peers include Jicarilla Dulce, WHITE SHIELD WATER TREATMENT PLANT, SAND POINT WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
Thompson Oaks (MN1740008) is drawn from EPA SDWIS. Nearby county systems in this extract include Owatonna; Blooming Prairie; Medford; Ellendale. Health-based rows (18 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.