Public water system record
St Louis City PWS
Serves St. Louis, St. Louis city, MO · 304,709 people served
Federal records show no health-based violations and 7 monitoring/reporting issues for St Louis City PWS in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 7
Key facts
- St Louis City PWS draws water from 2 surface water intakes and 2 reservoirs.
- Record on file since 2006, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 9,990 lead and 64,378 unknown out of 105,873 service lines.
Check whether St Louis City PWS 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
|
Dec 30, 2025 | Active |
|
LASSO
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Atrazine
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
Simazine
Monitoring and reporting
|
Oct 1, 2022 | Resolved |
|
LASSO
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
|
Simazine
Monitoring and reporting
|
Jul 1, 2022 | Resolved |
Full record since 2006
EPA's records for St Louis City PWS go back to 2006. Before October 19, 2016 they list no health-based violations and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 1 |
| 2020s | 0 | 7 |
Where the water comes from
St Louis City PWS draws water from 2 surface water intakes and 2 reservoirs. 3 other community water systems buy water from St Louis City PWS. 1 other public water system has an emergency connection to St Louis City PWS.
Community systems that buy water from it
- St Charles County PWSD 2 O'Fallon, MO
- St Charles PWS St Charles, MO
- St Peters PWS St Peters, MO
Annual water quality report
St Louis City PWS 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