Public water system record
Walnut Park
Serves an area of Lawrence County, SD that includes Spearfish · 180 people served
Federal records show 6 health-based violations and 3 monitoring/reporting issues for Walnut Park in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 6
- Resolved
- 6
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Walnut Park draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by South Dakota, March 2007.
- Record on file since 1976, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 39 unknown out of 69 service lines.
Check whether Walnut Park serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | Feb 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 2, 2018 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | May 16, 2018 | Resolved | No |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
210 | May 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 19, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2018 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
Full record since 1976
EPA's records for Walnut Park go back to 1976. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 63 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 2 |
| 1990s | 0 | 35 |
| 2000s | 1 | 24 |
| 2010 to October 18, 2016 | 4 | 2 |
| October 19, 2016 to 2019 | 4 | 2 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Groundwater Rule, began August 2016, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
Aug 19, 2016 | Resolved |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
Feb 1, 2016 | Resolved |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
Feb 1, 2013 | Resolved |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
May 1, 2010 | Resolved |
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
Feb 1, 2006 | Resolved |
Enforcement actions
South Dakota regulators took 1 formal enforcement action against Walnut Park in 2007, filed as 16 records in EPA's data. The most recent was a compliance order (no penalty) in March 2007.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 28, 2007 | South Dakota | Compliance order (no penalty) | 16 violations: Public Notice, Chlorine, Arsenic, Lead and Copper Rule, Haloacetic Acids (HAA5) |
What the violations mean
Stage 1 Disinfection Byproducts Rule
3 incidentsThe system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule
Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk
Groundwater Rule
2 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Walnut Park draws water from 1 well.
Annual water quality report
Walnut Park must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Walnut Park for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by South Dakota.
Certified drinking water labs by state EPA guidance for private wells