Monterey County, California
36 ZIP codes · Avg score 75/100 · Grade B · Updated
ZipCheckup grade for Monterey County: B.
This ZIP looks solid, with a few items worth a quick check.
Covering 36 ZIP codes, Monterey County earns a high grade for tap water - most systems report zero health-based violations, and the overall compliance rate comfortably exceeds federal benchmarks.
How Monterey County Compares
How Monterey County Compares
Monterey County scores 1 points below the California state average (76/100) and 2 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Monterey County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.6 (asthma 9.6%, diabetes 12.5%)
Estimated additional annual cost per homeowner: $2,853, driven primarily by wildfire
68.7% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Monterey County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 32 violations. Past 5 years: 90 total (90 health-based). Health-based violations are declining versus the prior 2-year window.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,853
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
143,377 housing units in Monterey County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Monterey County
Remediation costs are relatively manageable for most homeowners in Monterey County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Monterey County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Monterey County
8 community water systems serving Monterey County.
- B
- C
- B
- C
- B
- B
Show all 8 water systems
- B
- B
33 total water systems serve Monterey County.
Systems with the most violations in Monterey County
5 water systems with recorded EPA violations.
- B
- B
- B
- B
All ZIP Codes in Monterey County
36 ZIP codes tracked in Monterey County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 93905 | Salinas | 83 | B | 0 | $570K |
| 2 | 93906 | Salinas | 83 | B | 0 | $595K |
| 3 | 93926 | Gonzales | 83 | B | 2 | $598K |
| 4 | 93933 | Marina | 83 | B | 0 | $777K |
| 5 | 95012 | Castroville | 83 | B | 2 | $630K |
| 6 | 95039 | Moss Landing | 83 | B | 0 | $441K |
| 7 | 93901 | Salinas | 82 | B | 3 | $721K |
| 8 | 93908 | Salinas | 82 | B | 5 | $1071K |
| 9 | 93960 | Soledad | 80 | B | 6 | $568K |
| 10 | 93930 | King City | 79 | B | 2 (1 health) | $404K |
| 11 | 93927 | Greenfield | 78 | B | 3 (1 health) | $464K |
| 12 | 93907 | Salinas | 69 | C | 28 (24 health) | $677K |
| 13 | 93921 | Carmel By The Sea | 67 | C | 0 | $2000K |
| 14 | 93940 | Monterey | 67 | C | 0 | $1040K |
| 15 | 93943 | Monterey | 67 | C | 0 | — |
| 16 | 93944 | Monterey | 67 | C | 0 | — |
| 17 | 93950 | Pacific Grove | 67 | C | 0 | $1129K |
| 18 | 93953 | Pebble Beach | 67 | C | 0 | $1797K |
| 19 | 93955 | Seaside | 67 | C | 0 | $694K |
| 20 | 93923 | Carmel | 66 | C | 1 | $1571K |
| 21 | 93924 | Carmel Valley | 66 | C | 1 | $1133K |
| 22 | 93426 | Bradley | — | — | 10 (10 health) | $472K |
| 23 | 93450 | San Ardo | — | — | $427K | |
| 24 | 93451 | San Miguel | — | — | 10 (10 health) | $582K |
| 25 | 93902 | Salinas | — | — | — | |
| 26 | 93912 | Salinas | — | — | — | |
| 27 | 93915 | Salinas | — | — | — | |
| 28 | 93920 | Big Sur | — | — | $1804K | |
| 29 | 93922 | Carmel | — | — | — | |
| 30 | 93925 | Chualar | — | — | 2 | $656K |
| 31 | 93928 | Jolon | — | — | — | |
| 32 | 93932 | Lockwood | — | — | $550K | |
| 33 | 93942 | Monterey | — | — | — | |
| 34 | 93954 | San Lucas | — | — | $303K | |
| 35 | 93962 | Spreckels | — | — | $830K | |
| 36 | 95004 | Aromas | — | — | 5 (2 health) | $914K |
Recommended Buyer Guides for Monterey County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 68.7% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Monterey County, California
Overview
Monterey County in California covers 36 tracked ZIP records with an average Home Safety Score of B (75/100) across 21 scored records.
14 of 25 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 37 health-based violations appear in the available health breakdown.
← Back to California Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.