Pasadena, CA: 130 Violations — 81/100 (2026)
26 ZIP codes · 8 water systems · Updated 2026-06-03
Throughout Pasadena and across its water systems, EPA compliance data for CA shows above-average performance — violations are minimal, none of the tracked systems have recorded repeated MCL exceedances in recent cycles, and the safety picture has held steady across multiple reporting periods.
How Pasadena Compares
Data: EPA SDWIS Last verified: 2026-06-03
Water Quality Map: Pasadena, CA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Score Distribution
Safety grade breakdown for Pasadena's 26 ZIP codes.
Key Facts for Pasadena Residents
- Your city's water systems recorded 130 violations in the past 5 years.
- Average lead level: 0.0018 mg/L.
- Estimated remediation: $719 per household.
- CDC health risk index: 10.69.
Pasadena's Water Providers
Water delivery in Pasadena, CA is handled by 3 utilities rather than a single system — drawn from 8 providers in federal records, each filing its own compliance reports and setting its own rates.
Overview
We track water quality and home safety data for 26 ZIP codes in Pasadena, California (population ~150,994), covering 8 community water systems serving approximately 253,973 people region-wide.
26 of 26 ZIP codes (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Pasadena: B (81/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Pasadena water systems draw from: Groundwater, Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0018 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 2 (Moderate Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 25 ZIP codes
- Zone 3 (Low): 1 ZIP code
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 108 | 26 |
| Total Coliform | Microbiological | 27 | 26 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 91101 | B | 5 | 0 | Pasadena Water and Power |
| 91102 | B | 5 | 0 | Pasadena Water and Power |
| 91103 | B | 5 | 0 | Pasadena Water and Power |
| 91104 | B | 5 | 0 | Pasadena Water and Power |
| 91105 | B | 5 | 0 | Pasadena Water and Power |
| 91106 | B | 5 | 0 | Pasadena Water and Power |
| 91107 | B | 5 | 0 | Pasadena Water and Power |
| 91109 | A | 5 | 0 | Pasadena Water and Power |
| 91110 | B | 5 | 0 | Pasadena Water and Power |
| 91114 | B | 5 | 0 | Pasadena Water and Power |
All ZIP Codes in Pasadena
- 91101 [B] — 5 violations
- 91102 [B] — 5 violations
- 91103 [B] — 5 violations
- 91104 [B] — 5 violations
- 91105 [B] — 5 violations
- 91106 [B] — 5 violations
- 91107 [B] — 5 violations
- 91109 [A] — 5 violations
- 91110 [B] — 5 violations
- 91114 [B] — 5 violations
- 91115 [B] — 5 violations
- 91116 [B] — 5 violations
- 91117 [B] — 5 violations
- 91121 [B] — 5 violations
- 91123 [B] — 5 violations
- 91124 [B] — 5 violations
- 91125 [B] — 5 violations
- 91126 [B] — 5 violations
- 91129 [B] — 5 violations
- 91182 [B] — 5 violations
- 91184 [B] — 5 violations
- 91185 [B] — 5 violations
- 91188 [B] — 5 violations
- 91189 [B] — 5 violations
- 91191 [B] — 5 violations
- 91199 [B] — 5 violations
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Pasadena Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Pasadena's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
How Remediation Costs Compare in Pasadena
In Pasadena, the equity impact of remediation is proportionally small — not the kind of financial commitment that rises to the level of a genuine planning constraint, but a minor share of what most properties here are worth.
Remediation costs in Pasadena are relatively low compared to home values. The $212–$1,277 estimated range is a small fraction of median property value. Home values are 38% above the California average.
Pasadena: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Lead risk in Pasadena appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Pasadena: Flood History & Water Damage Risk
Over the multi-decade window covered by the National Flood Insurance Program, Pasadena has accumulated 73 claims — a total that suggests more than isolated flood exposure. With 19% of ZIP codes in designated flood zones, the water-quality implications of flooding move from hypothetical to periodically relevant: treatment intake can be compromised, wells can be infiltrated, and distribution backflow can occur.
Pasadena has a moderate flood history with 73 FEMA claims averaging $3,040 per payout. 19% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$719</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Pasadena, CA