Corolla, NC: 1 Violation — 67/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
Corolla's water quality grade in NC reflects a middle-ground assessment — service areas range from fully compliant to violation-flagged in current EPA records.
How Corolla Compares
Data: EPA SDWIS Last verified: 2026-06-03
Key Facts for Corolla Residents
- Your city's water systems recorded 1 violation in the past 5 years.
- Homes built before 1986: 20% — older plumbing may contain lead solder.
- Estimated remediation: $1,700 per household.
- CDC health risk index: 12.62 — above typical levels.
Corolla's Water Providers
At present, 2 utilities serve the bulk of Corolla, NC's residential water connections out of 2 systems active in the area, spread across independent providers with separate infrastructure and compliance obligations.
Overview
We track water quality and home safety data for 1 ZIP code in Corolla, North Carolina (population ~1,129), covering 2 community water systems serving approximately 10,809 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Corolla: C (67/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Corolla water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Corolla
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 27927 | C | 1 | 0 | Southern Outer Banks Wtr Syst |
All ZIP Codes in Corolla
- 27927 [C] — 1 violation
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
Updated daily.
Corolla Community Health Snapshot
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
What's in Corolla's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Corolla Infrastructure Age
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
Although a small portion of Corolla's homes predate 1986, the median build year of 1994 indicates the majority of the city's residential plumbing was installed after lead solder was banned — which tends to reduce the plumbing-related component of lead exposure at the household level.
Most homes in Corolla were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Corolla
While no remediation project is entirely without cost, the relationship between estimated remediation and property values in Corolla is notably favorable — the equity share is small enough that the household financial perspective is one of proportionality rather than pressure, and most homeowners can treat it as routine planning rather than a significant financial event.
Remediation costs in Corolla are relatively low compared to home values. The $1,100–$2,600 estimated range is a small fraction of median property value. Home values are 159% above the North Carolina average.
Corolla: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
In Corolla, the older-stock footprint runs at 20% — a contained slice — and aggregate utility readings land safely under the EPA action mark. That keeps lead off the local priority list, with a one-faucet draw remaining the only direct read on a specific address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Corolla: Flood History & Water Damage Risk
Flood risk in Corolla reaches a level where its interaction with water quality becomes a concrete planning concern rather than an abstract possibility. NFIP data records 1297 claims, and 100% of the area's ZIP codes are within FEMA-designated flood zones. At this exposure level, the mechanisms connecting major flood events to water quality disruption — treatment overload, well contamination, distribution backflow — have likely been activated repeatedly over the multi-decade NFIP tracking window.
Corolla has a significant flood history with 1,297 FEMA flood insurance claims on record, averaging $11,119 per claim. With 100% of ZIP codes in FEMA-designated flood zones, flood risk is a major concern for homeowners and water quality.
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. Flood damage can add significantly to the estimated <strong>$1,700</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
What You Can Do in Corolla
- Test your water at home. City-level data shows averages — your tap may differ. NSF-certified test kits cost $20-40 and give results in days.
- Install a certified water filter. Filters rated for Total Trihalomethanes (TTHM) can reduce the most common contaminant found in Corolla's water.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
Deep Dive Reports
Detailed analysis for Corolla, NC