Ada County, Idaho
39 ZIP codes · Avg score 77/100 · Grade B · Updated
ZipCheckup grade for Ada County: B.
This ZIP looks solid, with a few items worth a quick check.
Unlike many counties its size, Ada County keeps violation rates low - all 39 ZIP codes score at or above the state average for tap water safety, with no systemic concerns flagged in the current data set.
How Ada County Compares
How Ada County Compares
Ada County scores 5 points above the Idaho state average (72/100) and 4 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: Ada County, Idaho
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.9 (asthma 10.3%, diabetes 9%)
Estimated additional annual cost per homeowner: $747, driven primarily by flood
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across Ada County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 20 violations. Past 5 years: 36 total (36 health-based).
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: $747
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Ada County
Remediation costs are relatively manageable for most homeowners in Ada 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 Ada County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Ada County
8 community water systems serving Ada County.
- B
- B
- B
- C
- C
- C
Show all 8 water systems
- C
- C
19 total water systems serve Ada County.
Systems with the most violations in Ada County
5 water systems with recorded EPA violations.
- C
- C
- B
- B
- C
All ZIP Codes in Ada County
39 ZIP codes tracked in Ada County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 83616 | Eagle | 83 | B | 3 | $720K |
| 2 | 83634 | Kuna | 83 | B | 2 | $415K |
| 3 | 83669 | Star | 83 | B | 1 | $536K |
| 4 | 83703 | Boise | 83 | B | 2 | $477K |
| 5 | 83705 | Boise | 83 | B | 0 | $379K |
| 6 | 83712 | Boise | 83 | B | 0 | $758K |
| 7 | 83725 | Boise | 83 | B | 0 | — |
| 8 | 83702 | Boise | 82 | B | 2 | $708K |
| 9 | 83706 | Boise | 80 | B | 125 (3 health) | $489K |
| 10 | 83713 | Boise | 80 | B | 6 (4 health) | $422K |
| 11 | 83709 | Boise | 78 | B | 12 (4 health) | $441K |
| 12 | 83642 | Meridian | 67 | C | 1 | $492K |
| 13 | 83646 | Meridian | 67 | C | 0 | $488K |
| 14 | 83648 | Mountain Home A F B | 67 | C | 111 (1 health) | — |
| 15 | 83704 | Boise | 63 | C | 125 (3 health) | $354K |
| 16 | 83714 | Garden City | 62 | C | 127 (3 health) | $468K |
| 17 | 83680 | Meridian | — | — | — | |
| 18 | 83701 | Boise | — | — | — | |
| 19 | 83707 | Boise | — | — | — | |
| 20 | 83708 | Boise | — | — | — | |
| 21 | 83711 | Boise | — | — | — | |
| 22 | 83715 | Boise | — | — | — | |
| 23 | 83717 | Boise | — | — | — | |
| 24 | 83719 | Boise | — | — | — | |
| 25 | 83720 | Boise | — | — | — | |
| 26 | 83721 | Boise | — | — | — | |
| 27 | 83722 | Boise | — | — | — | |
| 28 | 83724 | Boise | — | — | — | |
| 29 | 83726 | Boise | — | — | — | |
| 30 | 83727 | Boise | — | — | — | |
| 31 | 83728 | Boise | — | — | — | |
| 32 | 83729 | Boise | — | — | — | |
| 33 | 83730 | Boise | — | — | — | |
| 34 | 83731 | Boise | — | — | — | |
| 35 | 83732 | Boise | — | — | — | |
| 36 | 83735 | Boise | — | — | — | |
| 37 | 83756 | Boise | — | — | — | |
| 38 | 83757 | Boise | — | — | — | |
| 39 | 83799 | Boise | — | — | — |
Recommended Buyer Guides for Ada 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 Water Filters for PFAS — PFAS detected in 1 ZIP code
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Ada County, Idaho
Overview
Ada County in Idaho covers 39 tracked ZIP records with an average Home Safety Score of B (77/100) across 16 scored records.
12 of 16 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 8 health-based violations appear in the available health breakdown.
← Back to Idaho 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.