Public water system record
Dayton Water System
Serves Dayton, Lake County, MT · 25 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Dayton Water 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
- 1
Key facts
- Dayton Water System draws water from 2 wells.
- Record on file since 1976, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 10 unknown out of 10 service lines.
Check whether Dayton Water 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 |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
Full record since 1976
EPA's records for Dayton Water System go back to 1976. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 6 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 2 |
| 2000s | 1 | 4 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2000, Archived.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2000 | Archived |
Where the water comes from
Dayton Water System draws water from 2 wells.
Annual water quality report
Dayton Water 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 Dayton Water 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 EPA Region 8.
Certified drinking water labs by state EPA guidance for private wells