Public water system record
St. Louis Center
On record as serving Chelsea, Washtenaw County, MI · Serves 56 people
Federal records show 4 health-based violations and 4 monitoring/reporting issues for St. Louis Center in the last ten years. The most serious issue in this window was a resolved Arsenic violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- St. Louis Center draws water from 4 wells.
- Highest measured level in the last 10 years: Arsenic, 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit), 2023.
- Most recent formal enforcement: compliance order (no penalty) by Michigan, December 2005.
- Record on file since 2000, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 13 service lines.
Check whether St. Louis Center 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 |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
330 | Oct 1, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jul 1, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
330 | Apr 1, 2023 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
330 | Jan 1, 2023 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
RPT
|
Dec 11, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2023 | Resolved |
|
Styrene
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
E. coli
Monitoring and reporting
|
Nov 25, 2016 | Resolved |
Full record since 2000
EPA's records for St. Louis Center go back to 2000. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 2 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 2 | 2 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 4 | 3 |
Most recent health-based violation before October 19, 2016: Arsenic, began January 2006, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.05 mg/L, federal limit 0.01 mg/L (5 times the limit)
|
Jan 23, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2000 | Resolved |
Enforcement actions
Michigan regulators took 2 formal enforcement actions against St. Louis Center and issued 1 boil water order between 2000 and 2005. The most recent was a compliance order (no penalty) in December 2005.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 5, 2005 | Michigan | Compliance order (no penalty) | 1 violation (1 health-based): Arsenic |
| Jul 20, 2005 | Michigan | Administrative penalty | 1 violation: Consumer Confidence Rule |
| Jun 10, 2000 | Michigan | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Arsenic
4 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
St. Louis Center draws water from 4 wells.
Annual water quality report
St. Louis Center 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 St. Louis Center 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 Michigan.
Certified drinking water labs by state EPA guidance for private wells