Riverside, CA water quality
Riverside, CA is served by 9 public water systems, serving 440,325 people combined. Across those systems, we count 0 health-based violations in the last 5 years. The worst Tap Grade among them is B.
Water systems serving Riverside
RIVERSIDE, CITY OF
RIVERSIDE, CA · 298,398 served
WESTERN MWD
RIVERSIDE, CA · 86,062 served
RUBIDOUX COMMUNITY SD
JURUPA VALLEY, CA · 36,827 served
WESTERN MWD - MURRIETA DIVISION
RIVERSIDE, CA · 17,453 served
HIDDEN VALLEY NATURE CENTER
RIVERSIDE, CA · 1,210 served
WESTERN MWD (ID A - RAINBOW)
RIVERSIDE, CA · 192 served
MAVERIK FUELING STATION
DESERT HOT SPRINGS, CA · 129 served
HARMONY HAVEN
RIVERSIDE, CA · 54 served
WESTERN MWD (ARLINGTON)
RIVERSIDE, CA · 0 served
Get alerted when Riverside's water gets a violation
Alert emails are in development; once they launch, we'll only email you about this water system. Unsubscribe anytime via contact@tapgraded.com.
Worried about what's in your tap?
See which water filters are certified to remove the contaminants found in your area.
Find a filter that matches your waterFrequently asked questions
Is Riverside, CA tap water safe to drink?
9 public water systems serve Riverside, CA, with 0 health-based violations in the last 5 years across them. The worst Tap Grade among them is B. A Tap Grade summarizes public EPA compliance records; it is not a determination that water is safe or unsafe to drink.
Does Riverside's water have lead in it?
The most recent 90th-percentile lead sample is 1.6 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in Riverside's water?
Yes — at least one water system serving Riverside has detected PFAS under UCMR5.
Other cities in California
See all of California →Source: EPA SDWIS/ECHO · Data as of 2026Q2
TapGraded presents public EPA data for information only — it is not health advice and not a determination that any water is safe or unsafe to drink. For health concerns, contact your water utility or local health department.