Public water system record
MO American St Louis St Charles Counties
Serves Chesterfield, Wildwood, Maryland Heights and 97 more places, St. Louis County and St. Charles County, MO · 1,111,000 people served
Federal records show no health-based violations and no monitoring or reporting issues for MO American St Louis St Charles Counties 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
- 0
Key facts
- MO American St Louis St Charles Counties draws water from 6 wells, 5 surface water intakes and 3 reservoirs (6 of them for emergency, seasonal or other part-time use).
- Record on file since 2005, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 9,422 lead and 191,341 unknown out of 388,276 service lines.
Check whether MO American St Louis St Charles Counties 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, and no monitoring or reporting violations either.
Full record since 2005
EPA's records for MO American St Louis St Charles Counties go back to 2005. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 1 | 1 |
| 2010 to October 18, 2016 | 1 | 0 |
Most recent health-based violation before October 19, 2016: Interim Enhanced Surface Water Treatment Rule (acute), began June 2010, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2007 | Resolved |
Where the water comes from
MO American St Louis St Charles Counties draws water from 6 wells, 5 surface water intakes and 3 reservoirs (6 of them for emergency, seasonal or other part-time use). It also has an emergency connection to St Louis City PWS. 7 other community water systems buy water from MO American St Louis St Charles Counties. 2 other public water systems have emergency connections to MO American St Louis St Charles Counties.
Emergency or part-time connections to
- St Louis City PWS St Louis, MO
Community systems that buy water from it
- Jefferson Co Cons PWSD C 1 Barnhart, MO
- Jefferson County PWSD 1 Arnold, MO
- Jefferson County PWSD 10 Imperial, MO
- Jefferson County PWSD 3 Arnold, MO
- Kirkwood PWS Kirkwood, MO
- Ofallon PWS O Fallon, MO
- Terrisan Charlotte, NC
Annual water quality report
MO American St Louis St Charles Counties 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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 Missouri.
Certified drinking water labs by state EPA guidance for private wells