WALNUT PARK
PWSID: SD4600316 · Spearfish, SD · Serves 180 people
According to EPA Safe Drinking Water Information System (SDWIS), WALNUT PARK (PWSID SD4600316) in Spearfish, SD is listed as a CWS water system covering about 180 people. The same extract lists 10 health-based violation records spanning 2006-2024. Those 10 health-based rows for WALNUT PARK cover contaminants such as Stage 1 Disinfectants and Disinfection Byproducts Rule, Groundwater Rule, LEAD AND COPPER RULE REVISIONS; they remain historical EPA registry entries, not a current compliance or drinkability score.
WALNUT PARK has 10 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. 3 distinct EPA contaminant codes appear in this system's record, including Stage 1 Disinfectants and Disinfection Byproducts Rule, Groundwater Rule, LEAD AND COPPER RULE REVISIONS. Recorded violations span 2006–2024. 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)
- SD4600316
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Spearfish, SD
- Population Served
- 180
- Health Violations
- Yes (10)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 7 | 7 |
| Groundwater Rule | 2 | 2 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
Violation History (10)
| Contaminant | Health | Date |
|---|---|---|
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2019 |
| Groundwater Rule | Yes | Oct 2, 2018 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | May 16, 2018 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | May 1, 2017 |
| Groundwater Rule | Yes | Aug 19, 2016 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2016 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2013 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | May 1, 2010 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | Yes | Feb 1, 2006 |
Frequently Asked Questions
What does EPA SDWIS list for WALNUT PARK?
How many people does WALNUT PARK serve?
What violations does WALNUT PARK have?
What contaminants have been found in WALNUT PARK water?
Compare beyond South Dakota
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest WALNUT PARK on cumulative violation count (10) and EPA-reported population served (180). Violation-count peers include ETHETE WATER SYSTEM, Quechan Utility, Grand Canyon West.
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
WALNUT PARK (SD4600316) is drawn from EPA SDWIS. Nearby county systems in this extract include SPEARFISH; LEAD; DEADWOOD; WHITEWOOD. Health-based rows (10 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.