Gwinnett County, Georgia
32 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-06-04
Within Gwinnett County, safety data across 32 ZIP codes suggests a fair but uneven system — violations are present and worth checking at the ZIP level.
How Gwinnett County Compares
How Gwinnett County Compares
Gwinnett County scores 18 points below the Georgia state average (75/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Gwinnett County, Georgia
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 11.5 (asthma 9.2%, diabetes 12.5%)
Estimated additional annual cost per homeowner: $492, driven primarily by flood
Infrastructure: 0.217% avg pipe failure probability
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: $492
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 Gwinnett County
Remediation costs are relatively manageable for most homeowners in Gwinnett 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 Gwinnett 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 Gwinnett County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | ATLANTA | 1,089,893 | 41 |
| 2 | Azalea Mobile Home Plaza | 300 | 36 |
| 3 | Plantation Inn Mobile Estates | 229 | 36 |
| 4 | Crawford County Estates | 167 | 36 |
| 5 | Chance`s Mobile Home Park | 146 | 36 |
18 total water systems serve Gwinnett County.
All ZIP Codes in Gwinnett County
32 ZIP codes tracked in Gwinnett County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 30045 | Lawrenceville | 70 | B | 0 | $333K |
| 2 | 30519 | Buford | 67 | C | 3 | $378K |
| 3 | 30042 | Lawrenceville | 66 | C | 0 | — |
| 4 | 30049 | Lawrenceville | 66 | C | 0 | — |
| 5 | 30071 | Norcross | 66 | C | 5 | $334K |
| 6 | 30043 | Lawrenceville | 65 | C | 0 | $345K |
| 7 | 30046 | Lawrenceville | 65 | C | 0 | $303K |
| 8 | 30052 | Loganville | 65 | C | 0 | $325K |
| 9 | 30515 | Buford | 63 | C | 3 | — |
| 10 | 30003 | Norcross | 62 | C | 5 | — |
| 11 | 30091 | Norcross | 62 | C | 5 | — |
| 12 | 30518 | Buford | 62 | C | 3 | $367K |
| 13 | 30092 | Norcross | 61 | C | 5 | $466K |
| 14 | 30093 | Norcross | 61 | C | 5 | $246K |
| 15 | 30044 | Lawrenceville | 60 | C | 0 | $295K |
| 16 | 30333 | Atlanta | 60 | C | 4 | — |
| 17 | 30356 | Atlanta | 60 | C | 4 | — |
| 18 | 30359 | Atlanta | 60 | C | 4 | — |
| 19 | 30362 | Atlanta | 60 | C | 4 | — |
| 20 | 31119 | Atlanta | 60 | C | 4 | — |
| 21 | 31141 | Atlanta | 60 | C | 4 | — |
| 22 | 31145 | Atlanta | 60 | C | 4 | — |
| 23 | 31146 | Atlanta | 60 | C | 4 | — |
| 24 | 39901 | Atlanta | 60 | C | 4 | — |
| 25 | 30017 | Grayson | 53 | D | 0 | $392K |
| 26 | 30024 | Suwanee | 45 | D | 0 | $491K |
| 27 | 30026 | North Metro | 40 | D | 0 | — |
| 28 | 30029 | North Metro | 40 | D | 0 | — |
| 29 | 30048 | Lilburn | 40 | D | 0 | — |
| 30 | 30096 | Duluth | 40 | D | 0 | $343K |
| 31 | 30098 | Duluth | 40 | D | 0 | — |
| 32 | 30099 | Duluth | 40 | D | 0 | — |
Recommended Buyer Guides for Gwinnett County
If FEMA records flag flood-top-risk status or EPA samples show PFAS exceedances, the matching logic lifts emergency-water and PFAS-rated filtration into the recommendations — federal data drives the order, not retailer arrangements.
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Gwinnett County, Georgia
Overview
Gwinnett County in Georgia covers 32 ZIP codes with an average Home Safety Score of C (57/100).
17 of 32 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Georgia 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.