Water Quality in 92401 — San Bernardino, CA
EPA data for SAN BERNARDINO CITY
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 92401 in San Bernardino, California is served by SAN BERNARDINO CITY (EPA ID: CA3610039). This system provides water to approximately 214,665 people from groundwater sources.
There are 12 community water systems serving this area.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
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Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| SAN BERNARDINO CITY | CA3610039 | 214,665 | Groundwater |
| SAN BERNARDINO VALLEY WD | CA3610019 | 109,608 | Groundwater |
| SBDNO COUNTY SERVICE AREA 64 | CA3610121 | 14,911 | Groundwater |
| MUSCOY MWC NO. 1 | CA3610031 | 13,000 | Groundwater |
| SBDNO COUNTY SERVICE AREA 70J | CA3610125 | 12,843 | Groundwater |
What You Can Do
- Review your annual Consumer Confidence Report (CCR) — Your utility publishes this each July
- Test your home’s water — Especially if you have older plumbing (pre-1986) that may contain lead
- Stay informed — Bookmark this page to check for updates on your water quality
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in California
- 90001 (Los Angeles) — 2 violations
- 90210 (Beverly Hills) — 10 violations
- 90301 (Inglewood) — 4 violations
- 90401 (Santa Monica)
- 90501 (Torrance)
- 90601 (Whittier)
- 90801 (Long Beach) — 42 violations
- 91101 (Pasadena) — 14 violations
- 91201 (Glendale)
- 91501 (Burbank) — 24 violations
- 91801 (Alhambra)
- 91909 (Chula Vista)
- 92008 (Carlsbad)
- 92025 (Escondido)
- 92049 (Oceanside)
- 92101 (San Diego) — 29 violations
- 92331 (Fontana)
- 92501 (Riverside)
- 92551 (Moreno Valley)
- 92602 (Irvine) — 19 violations
Nearby Water Quality Reports
- 92501 (Riverside) — 9 mi
- 92331 (Fontana) — 10 mi
- 92551 (Moreno Valley) — 16 mi
- 92877 (Corona) — 23 mi — 8 violations
- 92602 (Irvine) — 37 mi — 19 violations
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for SAN BERNARDINO CITY (CA3610039) on EPA.gov.
Frequently Asked Questions
Is the tap water in 92401 safe to drink?
Based on EPA records, the water system serving ZIP code 92401 has no recorded violations in the past 5 years. However, individual home conditions (old pipes, well water) can affect quality.
Where does 92401’s water come from?
The primary water source for this area is groundwater. SAN BERNARDINO CITY serves approximately 214,665 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 92401 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 92401. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 92401?
Radon zone data is not available for ZIP code 92401. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.