PWSID
CA0110006
State
California
City
HAYWARD
Population served
162,954
Primary source
SWP
Score history
No change since tracking began Jun 18, 2026.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
No PFAS detections are on record for this system from EPA’s UCMR5 monitoring (2023–25). Absence of a detection isn’t a guarantee — not every system was sampled, and this dataset doesn’t cover other contaminants.
Violations & enforcement
No violations are on record for this system in EPA’s SDWIS/ECHO data.
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Nitrate
3 stations · latest May 2021
Arsenic
1 station · latest Apr 2022
Fluoride
1 station · latest Apr 2022
Manganese
1 station · latest Apr 2022
Uranium
1 station · latest Apr 2022
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system CA0110006 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.