Water Quality in Santa Cruz, CA: 54 Violations — Grade C
Grade C · Score 65/100 · 5 water systems · Updated 2026-05-03
Santa Cruz's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Santa Cruz, CA has 54 violations in the EPA compliance history — breakdown below.
Water Quality Map: Santa Cruz, CA
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Water Quality by ZIP Code in Santa Cruz
Water quality varies across Santa Cruz's 6 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 95060 | D | 48 | 9 | 8 | View report → |
| 95063 | D | 50 | 9 | 8 | View report → |
| 95064 | D | 50 | 9 | 8 | View report → |
| 95062 | D | 53 | 9 | 8 | View report → |
| 95065 | D | 53 | 9 | 8 | View report → |
| 95061 | C | 58 | 9 | 8 | View report → |
Violation Trend
EPA violations recorded for water systems serving Santa Cruz.
Water Quality Overview
Santa Cruz, California receives a water quality grade of C with an overall score of 65 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 5 water systems serving Santa Cruz have accumulated 54 EPA violations, including 48 health-based violations. These violations are tracked across 6 ZIP codes serving approximately 95,967 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Santa Cruz's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Santa Cruz water systems is 0.0010 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 72% of homes built before 1986, Santa Cruz has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Santa Cruz
Santa Cruz is served by 5 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 95,967 people across 6 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 18 enforcement actions against water systems serving Santa Cruz. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Santa Cruz
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Santa Cruz Water Systems
The following contaminants have been detected or caused violations across Santa Cruz's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Lead | Inorganic | 0.015 mg/L | 36 | 6 | Yes |
| Combined Radium | Radionuclides | 5 pCi/L | 18 | 6 | Yes |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Santa Cruz:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2023 | 12 | 12 |
| 2024 | 42 | 42 |
| 2025 | 12 | 12 |
Violation counts have remained stable over the observed period.
EPA Enforcement History
The EPA and state regulators have taken 3 enforcement actions against water systems serving Santa Cruz. Recent actions:
| Date | Action Type |
|---|---|
| 2023-12-28 | State Filed Suit |
| 2022-12-01 | State Order Extension |
| 2022-09-06 | State Filed Suit |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2023-12-28.
Santa Cruz vs. Nearby California Cities
How Santa Cruz's water quality compares to similar cities in California:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Santa Cruz | C | 54 | 5 | 95,967 |
| Simi Valley | B | 18 | 3 | 95,529 |
| Merced | B | 25 | 4 | 96,509 |
| Vernalis | B | 0 | 1 | 96,609 |
Recommended Water Filters for Santa Cruz
Based on contaminants detected in Santa Cruz's water supply, these filter types are recommended:
Granular Activated Carbon (GAC, whole-house POE)
- Removes: Total Trihalomethanes (TTHM)
- Effectiveness: 80-99%
- Cost range: $400–$2000
- Certification: NSF/ANSI 53
- Recommended products:
Granular Activated Carbon (GAC, under-sink or whole-house)
- Removes: Haloacetic Acids (five) (HAA5)
- Effectiveness: 60-80%
- Cost range: $100–$600
- Certification: NSF/ANSI 53
- Recommended products:
Water Quality by ZIP Code in Santa Cruz
Water quality varies across Santa Cruz's ZIP codes. The table below shows the worst-scoring and best-scoring areas:
| ZIP Code | Score | Grade | Violations | Health-Based |
|---|---|---|---|---|
| 95060 | 48 | D | 9 | 8 |
| 95063 | 50 | D | 9 | 8 |
| 95064 | 50 | D | 9 | 8 |
| 95062 | 53 | D | 9 | 8 |
| 95065 | 53 | D | 9 | 8 |
| 95061 | 58 | C | 9 | 8 |
Common Questions About Santa Cruz Water
These are the most common questions residents search for about water quality in Santa Cruz, California:
Is Santa Cruz water hard or soft? Water hardness varies by source. Santa Cruz's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Santa Cruz tap water? Santa Cruz's water receives a grade of C (65/100). There are 48 health-based violations — consider filtration.
What is the best water filter for Santa Cruz? Based on detected contaminants, a granular activated carbon (gac, whole-house poe) filter is most recommended. See our Water Filter Matcher for personalized recommendations.
Santa Cruz vs. California Average
Understanding how Santa Cruz compares to the broader California average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Santa Cruz.
ZIP Codes in Santa Cruz
Santa Cruz spans 6 ZIP codes. The ZIP with the lowest water quality score is 95060. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
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
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.