Del Norte County, California
9 ZIP codes · Avg score 84/100 · Grade B · Updated 2026-06-03
EPA monitoring reports for Del Norte County cover 9 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How Del Norte County Compares
How Del Norte County Compares
Del Norte County scores 11 points above the California state average (73/100) and 16 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Del Norte County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.3 (asthma 10.8%, diabetes 12.3%)
Estimated additional annual cost per homeowner: $1,713, driven primarily by sea_level
Infrastructure: 0.333% avg pipe failure probability, 22% of ZIPs at high risk
59.1% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,713
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,520 housing units in Del Norte 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 Del Norte County
Remediation costs are relatively manageable for most homeowners in Del Norte 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 Del Norte County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Del Norte County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Klamath C.s.d. | 360 | 8 |
| 2 | Redwood Park C.s.d. | 200 | 8 |
| 3 | Hunter Valley Csd | 96 | 8 |
| 4 | SMITH RIVER C.S.D. | 2,568 | 2 |
| 5 | Gasquet C.s.d. | 657 | 1 |
17 total water systems serve Del Norte County.
All ZIP Codes in Del Norte County
9 ZIP codes tracked in Del Norte County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 95532 | Crescent City | 99 | A | 0 | — |
| 2 | 95543 | Gasquet | 99 | A | 1 | $365K |
| 3 | 95531 | Crescent City | 95 | A | 0 | $324K |
| 4 | 95567 | Smith River | 95 | A | 1 | $327K |
| 5 | 93596 | Boron | 87 | A | 0 | — |
| 6 | 95548 | Klamath | 79 | B | 8 (3 health) | $224K |
| 7 | 95537 | Fields Landing | 66 | C | 0 | $360K |
| 8 | 95538 | Fort Dick | 66 | C | 0 | $286K |
| 9 | 95564 | Samoa | 66 | C | 0 | $422K |
Recommended Buyer Guides for Del Norte County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 59.1% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Del Norte County, California
Overview
Del Norte County in California covers 9 ZIP codes with an average Home Safety Score of B (84/100).
3 of 9 ZIP codes have recorded EPA violations. 3 health-based violations have been documented.
← Back to California water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.