Nampa, ID: 15 Health Violations - Home Safety 76/100
5 ZIP codes · 12 water systems · Updated
ZipCheckup grade for Nampa: B.
This ZIP has a few items worth a quick check.
Your top priority: match a filter's certification to the violations (15 health-based violations). NSF certified filters →
Nampa, ID carries a grade in ZipCheckup's upper tier; any health-based violations on record should be checked per water system.
How Nampa Compares
Data: EPA SDWIS
What You Should Know About Nampa Water
- Your city's water systems recorded 43 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0047 mg/L.
- Homes built before 1986: 36% - older plumbing may contain lead solder.
- Estimated remediation: $450 per household.
- Health risk index (ZipCheckup composite of CDC data): 12.08.
Who Supplies Your Water in Nampa
Counting every public water system linked to Nampa, ID in federal data gives 12. The list below keeps the 3 largest by reported population served, a figure that covers each system's whole service area rather than the city alone. A household's own supplier is named on its water bill.
- B
- B
- B
Overview
We track home safety data for 5 ZIP codes in Nampa, Idaho (population ~136,828), covering 12 community water systems serving approximately 208,152 people region-wide. The EPA snapshots used for this build directly map water systems to 3 of 5 ZIP codes.
3 of 3 ZIP codes with a reported violation count in the available EPA record (100%) have recorded EPA violations. 15 health-based violations appear in the available health breakdown.
Home Safety Score
Average Home Safety Score for Nampa: B (76/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Nampa water systems draw from: Groundwater.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0047 mg/L (EPA action level: 0.015 mg/L)
- 0 of 3 ZIP codes with known status exceed the EPA lead action level
Radon Risk
5 of 5 ZIP records with known zones are in EPA Radon Zone 2.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Arsenic | Inorganic | 23 | 2 |
| Public Notice Rule | Reporting | 10 | 1 |
| Revised Total Coliform Rule | Microbiological | 8 | 3 |
| Groundwater Rule | Treatment Technique | 8 | 1 |
| Lead and Copper Rule Revisions | Treatment Technique | 6 | 2 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 83686 | C | 30 | 14 | City of Nampa |
| 83651 | B | 9 | 1 | City of Nampa |
| 83687 | B | 9 | 0 | City of Nampa |
All ZIP Codes in Nampa
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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Health Outcomes in Nampa
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Nampa Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Nampa
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
A citywide median of 1988 for construction says little about any single address in Nampa. Homes built before 1986, when federal amendments restricted the lead content allowed in new pipe, solder and flux, may contain plumbing materials with more lead, and later renovations may have replaced them. An inspection of the plumbing can identify the materials, and sending a tap water sample to an accredited laboratory measures lead.
Most homes in Nampa were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Nampa Homeowners
Relative to home values, Nampa remediation estimates run low.
Estimated remediation costs in Nampa can be compared with local home values. The $225–$1,050 estimated range can be set against the median property value; actual costs vary by home. Home values are 11% above the Idaho average.
Lead Exposure Risk for Children in Nampa
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
If you have young children or are pregnant, consider testing your home's water - especially if your home was built before 1986.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Historical NFIP Claim Context in Nampa
Historical NFIP data for Nampa contains 9 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $3,014. Among ZIP codes with claim records, 50% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The $450 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
Deep Dive Reports
Detailed analysis for Nampa, ID