Public water system record
Hermosa-Old System
Serves Hermosa, Custer County, SD · 420 people served
Federal records show no health-based violations and 4 monitoring/reporting issues for Hermosa-Old System in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Hermosa-Old System draws water from 1 well.
- Record on file since 1976, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 99 unknown out of 300 service lines.
Check whether Hermosa-Old System 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2025 | Resolved |
|
Combined Uranium
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
Full record since 1976
EPA's records for Hermosa-Old System go back to 1976. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 9 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 2 |
| 1990s | 0 | 3 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 1 | 0 |
| 2020s | 0 | 4 |
Most recent health-based violation before October 19, 2016: Stage 1 Disinfection Byproducts Rule, began February 2010, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
|
Feb 1, 2010 | Resolved |
Where the water comes from
Hermosa-Old System draws water from 1 well. 1 other community water system buys water from Hermosa-Old System.
Community systems that buy water from it
- North Hermosa Wud Hermosa, SD
Annual water quality report
Hermosa-Old System 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 Hermosa-Old System 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