Glynn County, Georgia
8 ZIP codes · Avg score 85/100 · Grade A · Updated 2026-06-03
For households in Glynn County, the 8 ZIP codes on record show consistently safe tap water.
How Glynn County Compares
How Glynn County Compares
Glynn County scores 10 points above the Georgia state average (75/100) and 17 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Glynn County, Georgia
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.6 (asthma 10.1%, diabetes 15.3%)
Estimated additional annual cost per homeowner: $2,744, driven primarily by flood
Infrastructure: 0.259% avg pipe failure probability
51.2% 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: $2,744
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
42,418 housing units in Glynn 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 Glynn County
Remediation costs are relatively manageable for most homeowners in Glynn 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 Glynn 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 Glynn County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | St. Simons Island | 29,249 | 16 |
| 2 | Sea Island Company | 1,859 | 16 |
| 3 | Brunswick | 44,739 | 15 |
| 4 | Glynn Company-south Main Land | 2,554 | 15 |
| 5 | Oak Grove Island Plantation | 775 | 15 |
10 total water systems serve Glynn County.
All ZIP Codes in Glynn County
8 ZIP codes tracked in Glynn County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 31521 | Brunswick | 98 | A | 3 (1 health) | — |
| 2 | 31524 | Brunswick | 98 | A | 3 (1 health) | — |
| 3 | 31561 | Sea Island | 85 | A | 1 | $2000K |
| 4 | 31522 | Saint Simons Island | 80 | B | 0 | $498K |
| 5 | 31520 | Brunswick | 79 | B | 3 (1 health) | $135K |
| 6 | 31523 | Brunswick | 79 | B | 3 (1 health) | $276K |
| 7 | 31525 | Brunswick | 79 | B | 3 (1 health) | $199K |
| 8 | 31527 | Jekyll Island | 78 | B | 0 | $522K |
Recommended Buyer Guides for Glynn County
Below: editorial picks, no sponsored placements.
- Best Lead Paint Test Kits — 51.2% of homes built before 1978
- 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 Glynn County, Georgia
Overview
Glynn County in Georgia covers 8 ZIP codes with an average Home Safety Score of A (85/100).
6 of 8 ZIP codes have recorded EPA violations. 5 health-based violations have been documented.
← 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.