Guilford County, North Carolina
47 ZIP codes · Avg score 89/100 · Grade A · Updated 2026-06-04
Throughout Guilford County, the 47 monitored ZIP codes show low violation rates and healthy safety scores — a pattern that puts the county well above the state baseline for drinking water quality.
How Guilford County Compares
How Guilford County Compares
Guilford County scores 16 points above the North Carolina state average (73/100) and 21 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: Guilford County, North Carolina
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.9 (asthma 11.2%, diabetes 12.2%)
Estimated additional annual cost per homeowner: $752, driven primarily by flood
Infrastructure: 0.35% avg pipe failure probability, 11% of ZIPs at high risk
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Guilford County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 41 violations. Past 5 years: 53 total (53 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $752
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 Guilford County
Remediation costs are relatively manageable for most homeowners in Guilford 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 Guilford 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 Guilford County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Greensboro, | 319,588 | 1166 |
| 2 | Quarterstone Farm/country Xing | 683 | 1080 |
| 3 | Springdale S/d | 267 | 1078 |
| 4 | Crown Mhp | 343 | 1073 |
| 5 | Huntington Woods Mhp | 300 | 1073 |
49 total water systems serve Guilford County.
All ZIP Codes in Guilford County
47 ZIP codes tracked in Guilford County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 27261 | High Point | 98 | A | 3 (1 health) | — |
| 2 | 27264 | High Point | 98 | A | 3 (1 health) | — |
| 3 | 27268 | High Point | 98 | A | 3 (1 health) | — |
| 4 | 27357 | Stokesdale | 98 | A | 5 (1 health) | $260K |
| 5 | 27358 | Summerfield | 98 | A | 3 | $410K |
| 6 | 27235 | Colfax | 95 | A | 0 | $281K |
| 7 | 27233 | Climax | 94 | A | 16 (1 health) | $216K |
| 8 | 27310 | Oak Ridge | 94 | A | 3 | $496K |
| 9 | 27395 | Greensboro | 93 | A | 37 (2 health) | — |
| 10 | 27411 | Greensboro | 93 | A | 37 (2 health) | — |
| 11 | 27412 | Greensboro | 93 | A | 37 (2 health) | — |
| 12 | 27413 | Greensboro | 93 | A | 37 (2 health) | — |
| 13 | 27415 | Greensboro | 93 | A | 37 (2 health) | — |
| 14 | 27416 | Greensboro | 93 | A | 37 (2 health) | — |
| 15 | 27417 | Greensboro | 93 | A | 37 (2 health) | — |
| 16 | 27419 | Greensboro | 93 | A | 37 (2 health) | — |
| 17 | 27425 | Greensboro | 93 | A | 37 (2 health) | — |
| 18 | 27427 | Greensboro | 93 | A | 37 (2 health) | — |
| 19 | 27435 | Greensboro | 93 | A | 37 (2 health) | — |
| 20 | 27438 | Greensboro | 93 | A | 37 (2 health) | — |
| 21 | 27495 | Greensboro | 93 | A | 37 (2 health) | — |
| 22 | 27497 | Greensboro | 93 | A | 37 (2 health) | — |
| 23 | 27499 | Greensboro | 93 | A | 37 (2 health) | — |
| 24 | 27402 | Greensboro | 90 | A | 37 (2 health) | — |
| 25 | 27404 | Greensboro | 90 | A | 37 (2 health) | — |
| 26 | 27409 | Greensboro | 90 | A | 37 (2 health) | $189K |
| 27 | 27455 | Greensboro | 90 | A | 37 (2 health) | $324K |
| 28 | 27498 | Greensboro | 90 | A | 37 (2 health) | — |
| 29 | 27263 | High Point | 89 | A | 3 (1 health) | $172K |
| 30 | 27265 | High Point | 89 | A | 3 (1 health) | $239K |
| 31 | 27282 | Jamestown | 86 | A | 2 | $267K |
| 32 | 27377 | Whitsett | 85 | A | 23 (2 health) | $259K |
| 33 | 27401 | Greensboro | 85 | A | 37 (2 health) | $138K |
| 34 | 27403 | Greensboro | 85 | A | 37 (2 health) | $219K |
| 35 | 27405 | Greensboro | 85 | A | 37 (2 health) | $151K |
| 36 | 27406 | Greensboro | 85 | A | 37 (2 health) | $192K |
| 37 | 27410 | Greensboro | 85 | A | 37 (2 health) | $308K |
| 38 | 27420 | Greensboro | 85 | A | 37 (2 health) | — |
| 39 | 27429 | Greensboro | 85 | A | 37 (2 health) | — |
| 40 | 27262 | High Point | 84 | B | 3 (1 health) | $213K |
| 41 | 27313 | Pleasant Garden | 83 | B | 27 (1 health) | $212K |
| 42 | 27214 | Browns Summit | 81 | B | 25 | $298K |
| 43 | 27407 | Greensboro | 80 | B | 37 (2 health) | $204K |
| 44 | 27408 | Greensboro | 80 | B | 37 (2 health) | $331K |
| 45 | 27249 | Gibsonville | 78 | B | 7 (1 health) | $220K |
| 46 | 27283 | Julian | 66 | C | 0 | $200K |
| 47 | 27342 | Sedalia | 66 | C | 0 | $182K |
Recommended Buyer Guides for Guilford County
Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.
- 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 Guilford County, North Carolina
Overview
Guilford County in North Carolina covers 47 ZIP codes with an average Home Safety Score of A (89/100).
44 of 47 ZIP codes have recorded EPA violations. 70 health-based violations have been documented.
← Back to North Carolina 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.