MODESTO, CITY OF
Modesto, CA · 218,771 served
MODESTO, CITY OF serves 218,771 people in Modesto, CA. It has 0 health-based violations in the last 5 years. TapGraded gives this system a C.
Score breakdown
Health-based violations (5y)
0
Monitoring violations (5y)
0
Currently unaddressed
0
Overall score
65/100
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 purchased from another system
- Ownership
- Local government
- Service connections
- 70,793
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Is Modesto, CA tap water safe to drink?
MODESTO, CITY OF has 0 health-based violations in the last 5 years. TapGraded gives this system a C.
Does MODESTO, CITY OF have lead in its water?
The most recent 90th-percentile lead sample is 12 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in MODESTO, CITY OF's water?
Yes — PFAS was detected at or above the EPA MCL for 2 of the tracked analytes.
Source: EPA SDWIS/ECHO · Data as of 2026Q2