Water Quality Report

San Francisco, CA: Lead Above EPA Action Level

EPA data for Treasure Island

System 90th-Percentile Lead Result Exceeds EPA Action Level

EPA records for the water systems mapped to 94130 in San Francisco, CA contain zero recorded violations for inclusive record years 2021 through 2026. This does not establish that every category was monitored or published, and it does not cover events outside that source window.

Data source: U.S. Environmental Protection Agency (EPA) SDWIS

Based on EPA Drinking Water FEMA Flood Data U.S. Census CDC Energy Information Admin. USGS Water Data & 9 more federal sources

Latest air quality, EPA records and weather alerts Current data temporarily unavailable

Current EPA violation data unavailable

Safety Score N/A

Water Quality No violations

Lead Risk High 0.1 mg/L, 90th percentile, sample period ending 2024-12-31

NFIP Claim History N/A

Data confidence: High (direct measurement) Medium (sampled / sub-geography) Low (modeled / inferred) Methodology →

At a Glance

Water No drinking-water violations in EPA records since 2021.
Lead 90th-percentile lead reading of 0.1 mg/L; the EPA action level of 0.015 mg/L applies to a water system's 90th-percentile result.
Radon EPA Zone 2 - county-level radon potential, not a home measurement.

Contaminant Summary

Evidence unavailable

Report data assembled: Jul 27, 2026 EPA water-system identity: source date or period is not present in ZipCheckup's accepted source record EPA violation history: more than two update cycles old Lead, copper and UCMR measurements: source date or period is not present in ZipCheckup's accepted source record Consumer Confidence Report: source date or period is not present in ZipCheckup's accepted source record

Water System

3,864

People Served

Health Violations (since 2021)

Surface water

Water Source

0.1 mg/L

Reported Lead Result ⚠ Above EPA Action Level43.5× the national median for this measure

Zone 2

County Radon Potential · Moderate

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The top classification in San Francisco (94130) safety data is critical - only one condition reaches that level, with no high-priority findings documented below it.

System 90th-Percentile Lead Result Above EPA Action Level CRITICAL

System 90th-percentile lead result of 100 ppb is above the EPA action level of 15 ppb. Lead is especially dangerous for children and pregnant women.

What to do: Get a certified water test and consider an NSF/ANSI 58 reverse osmosis system that is also certified for lead reduction. See Lead & Copper History below ↓ ↓

Score Breakdown

Overall Home Safety Score: Score unavailable

Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.

Canonical components

EPA water compliance

100/100

Observed

PFAS MCL screen

Unknown

Evidence missing

EPA radon zone

50/100

Observed

Annual EPA AirData AQI

Unknown

Evidence missing

Required domains

Drinking water

Unknown

Indoor environment

50/100

Outdoor environment

Unknown

Coverage: 2 of 4 components and 1 of 3 domains observed.

Model 4.0.0; series home-safety-v4-cross-vertical.

Safety & Health (7) CRITICAL

Your Water System

ZIP code 94130 in San Francisco, California is mapped to the water system Treasure Island (EPA ID: CA3810702). This system provides water to approximately 3,864 people from surface water sources.

Other Water Quality Reports in California

Nearby Water Quality Reports

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Treasure Island (CA3810702) on EPA.gov.

2 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.

📊 EPA Safe Drinking Water · View source →

Environmental Hazards (10) CRITICAL

Home & Infrastructure (6) HIGH

Possible home maintenance concerns - talk to a local expert.

Call (855) 384-4856

Paid Partner This is a free service. You will be connected with an independent service provider. We may receive compensation.

Cost & Community (9) HIGH

CPSC product recall notices

These national notices are not matched to this ZIP code or water system.

View all recalls →

📊 CPSC · View source →

Protect Your Home in San Francisco

Based on local data for ZIP 94130, these services may benefit homeowners in your area.

Based on local data for your area. Use the tools below to explore your options.

Gutter Installation & Repair

The median home in 94130 was built around 1953. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.

Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home

Estimate Your Home Maintenance Costs

Window Replacement

The median build year of homes in San Francisco is 1953; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.

Typical cost: Window replacement: typically $300–$800 per window installed

Estimate Your Home Maintenance Costs

Roofing Inspection & Repair

Homes built around 1953 may be on their second or third roof. A professional inspection can catch damage before leaks start.

Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500

Estimate Your Home Insurance Needs

Service recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.

Frequently Asked Questions

Is the tap water in 94130 safe to drink?

EPA SDWIS records 0 violations since 2021 across the water systems mapped to ZIP 94130 (primary system: Treasure Island), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.

Where does 94130's water come from?

The recorded water source for Treasure Island, a system mapped to ZIP code 94130, is Surface water. This system serves approximately 3,864 people.

How can I get my water tested in San Francisco?

If Treasure Island supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.

Is lead a concern in 94130 tap water?

The Lead and Copper Rule record selected for 94130 reports a 90th-percentile lead result of 0.1 mg/L for a water system mapped to this ZIP (record date 2024-12-31). The EPA action level is 0.015 mg/L. This system 90th-percentile result is above the EPA lead action level of 0.015 mg/L, which requires corrective action by the system; consider a filter certified for lead reduction.

What is the radon risk for 94130?

94130 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in San Francisco County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.

How to cite this page

APA ZipCheckup. (2026). San Francisco, CA: Lead Above EPA Action Level. https://zipcheckup.com/report/94130/

BibTeX

@misc{zipcheckup-report-94130,
  author = {{ZipCheckup}},
  title  = {{San Francisco, CA: Lead Above EPA Action Level}},
  year   = {2026},
  url    = {https://zipcheckup.com/report/94130/}
}

Page version: October 2026.

Nearby ZIP Code Reports

Water quality comparison for ZIP codes near 94130

ZIP Code	City, State	Distance	Grade
94111	San Francisco, CA	2.4 mi	N/A
94133	San Francisco, CA	2.7 mi	N/A
94105	San Francisco, CA	2.8 mi	N/A
94104	San Francisco, CA	2.8 mi	N/A
94108	San Francisco, CA	3.0 mi	N/A
94156	San Francisco, CA	3.4 mi	N/A
94162	San Francisco, CA	3.4 mi	N/A
94109	San Francisco, CA	3.5 mi	N/A
94158	San Francisco, CA	3.8 mi	N/A
94102	San Francisco, CA	3.9 mi	N/A