WILLOW LAKE
PWSID: SD4600370 · Willow Lake, SD · Serves 255 people
According to EPA Safe Drinking Water Information System (SDWIS), WILLOW LAKE (PWSID SD4600370) in Willow Lake, SD is listed as a CWS water system covering about 255 people. The same extract lists 7 health-based violation records spanning 2006-2020. Those 7 health-based rows for WILLOW LAKE cover contaminants such as Stage 1 Disinfectants and Disinfection Byproducts Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
WILLOW LAKE has 7 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 Stage 1 Disinfectants and Disinfection Byproducts Rule. Recorded violations span 2006–2020. Day-to-day primacy enforcement for this system runs through the South Dakota 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 South Dakota state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- SD4600370
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Willow Lake, SD
- Population Served
- 255
- Health Violations
- Yes (7)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 7 | 7 |
Violation History (7)
| Contaminant | Health | Date |
|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Nov 23, 2020 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Nov 23, 2020 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Nov 23, 2020 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2015 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2015 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2011 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 23, 2006 |
Frequently Asked Questions
What does EPA SDWIS list for WILLOW LAKE?
How many people does WILLOW LAKE serve?
What violations does WILLOW LAKE have?
What contaminants have been found in WILLOW LAKE water?
Compare beyond South Dakota
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest WILLOW LAKE on cumulative violation count (7) and EPA-reported population served (255). Violation-count peers include SANTEE UTILITY COMMISSION, CHEFORNAK WATER SYSTEM, LYNN WATER WORKS.
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
WILLOW LAKE (SD4600370) is drawn from EPA SDWIS. Nearby county systems in this extract include CLARK RURAL WATER SYSTEM; CLARK; CLARK RURAL WATER-KAMPESKA; GARDEN CITY. Health-based rows (7 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.