MO AMERICAN ST LOUIS ST CHARLES COUNTIES
Chesterfield, MO · 1,111,000 served
MO AMERICAN ST LOUIS ST CHARLES COUNTIES serves 1,111,000 people in Chesterfield, MO. It has 0 health-based violations in the last 5 years. TapGraded gives this system an A.
Score breakdown
Health-based violations (5y)
0
Monitoring violations (5y)
0
Currently unaddressed
0
Overall score
100/100
Violation history (last 5 years)
No violations on record.
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Lead (Lead and Copper Rule)
EPA's current lead action level is 15 ppb (dropping to 10 ppb in 2027 under the Lead and Copper Rule Improvements).
PFAS (UCMR5 occurrence data)
System details
- System type
- Community water system
- Water source
- Surface water
- Ownership
- Private
- Service connections
- 376,501
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Is Chesterfield, MO tap water safe to drink?
MO AMERICAN ST LOUIS ST CHARLES COUNTIES has 0 health-based violations in the last 5 years. TapGraded gives this system an A.
Does MO AMERICAN ST LOUIS ST CHARLES COUNTIES have lead in its water?
The most recent 90th-percentile lead sample is 0 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in MO AMERICAN ST LOUIS ST CHARLES COUNTIES's water?
This system was tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Source: EPA SDWIS/ECHO · Data as of 2026Q2