B64/100
RIVERSIDE HIGHLAND WATER COMPANY — Water Quality Report 2026
Serving 20,188 people · California
Water Source
Groundwater
County
—
System ID
CA3610057
Violations
2
Contaminant Test Results
5 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.019 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.015 µg/L | 0.004 µg/L | Over Limit |
PFHxS | 0.011 µg/L | 0.010 µg/L | Over Limit |
1,4-dioxane | 1.80 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed to issue ongoing public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About RIVERSIDE HIGHLAND WATER COMPANY
Is RIVERSIDE HIGHLAND WATER COMPANY water safe to drink?
RIVERSIDE HIGHLAND WATER COMPANY water receives a grade of B (64/100), which is considered good. Out of 66 contaminants tested, 3 exceed EPA legal limits. 5 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has RIVERSIDE HIGHLAND WATER COMPANY detected?
66 contaminants were tested in RIVERSIDE HIGHLAND WATER COMPANY's water. Notable contaminants include PFOS, PFOA, PFHxS, Lead (90th percentile), 1,4-dioxane. 3 exceed EPA legal limits (MCLs). 5 exceed EPA health goals (MCLGs).
Does RIVERSIDE HIGHLAND WATER COMPANY have any EPA violations?
Yes, RIVERSIDE HIGHLAND WATER COMPANY has 2 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MCL. 1 are health-based violations.
How many people does RIVERSIDE HIGHLAND WATER COMPANY serve?
RIVERSIDE HIGHLAND WATER COMPANY serves approximately 20,188 people, California.
What type of water does RIVERSIDE HIGHLAND WATER COMPANY provide?
RIVERSIDE HIGHLAND WATER COMPANY sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA3610057.
How does RIVERSIDE HIGHLAND WATER COMPANY compare to other utilities in California?
RIVERSIDE HIGHLAND WATER COMPANY scores 64/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.