Rockbridge S/d
EPA ID: NC4092073 · 1,042 people served · 1 ZIP code
ZipCheckup's reading of EPA records for Rockbridge S/d (NC4092073): 4 violations recorded with unresolved status in the SDWIS data used. EPA record snapshot: Rockbridge S/d, 4 open violations, 1,042 people served.
Data: EPA SDWIS
Service Area Map
Coverage area for Rockbridge S/d Source: EPA SDWIS service area boundaries.
Service area boundary - average Home Safety grade of mapped ZIPs: D
Demographics of ZIP Codes Served
The ZIP codes associated with Rockbridge S/d have a median household income of $85,400 and about 33,750 residents live in those ZIP codes (Census; not the number of people this system supplies).
💧 Where Does Your Water Come From?
Rockbridge S/d's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 5 detections recorded. 1 detection is above the level of a federal PFAS MCL (4 ppt for PFOA and PFOS), with compliance required from 2029.
Comparable Water Systems
Similar-sized systems in North Carolina
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Rockbridge S/d (EPA ID: NC4092073) is a community water system in North Carolina that serves approximately 1,042 people from groundwater sources.
This system serves ZIP code 27545 in Knightdale.
ZIP-Area Home Safety Context: D (50/100)
This is the average Home Safety Score for 1 of 1 service-area ZIP codes with all required score domains observed. It is not a grade for the water utility.
Model 4.0.0 uses SDWIS identity plus accepted ECHO SDWA lifecycle-based water compliance, the UCMR 5 PFAS MCL screen, EPA radon zone, and annual EPA AirData AQI across three equally weighted domains. Missing required evidence suppresses the score.
Violation History
Status breakdown for accepted records with record years 2021-2026: 15 resolved, 11 archived, 4 addressed, and 0 unaddressed. Under this source contract, current noncompliance is the sum of addressed and unaddressed records. Archived and resolved records are excluded from current noncompliance.
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| March 2, 2026 | Public Notice | Non-health-based | Addressed (current) |
| March 2, 2026 | Public Notice | Non-health-based | Addressed (current) |
| February 1, 2026 | Revised Total Coliform Rule | Non-health-based | Archived |
| February 1, 2026 | Chlorine | Non-health-based | Resolved |
| January 1, 2026 | Gross Alpha | Health-based | Archived |
| January 1, 2026 | Combined Uranium | Health-based | Archived |
| January 1, 2026 | Revised Total Coliform Rule | Non-health-based | Archived |
| December 1, 2025 | Revised Total Coliform Rule | Non-health-based | Archived |
| December 1, 2025 | Chlorine | Non-health-based | Resolved |
| November 1, 2025 | Revised Total Coliform Rule | Non-health-based | Archived |
| November 1, 2025 | Chlorine | Non-health-based | Resolved |
| October 1, 2025 | Gross Alpha | Health-based | Archived |
| October 1, 2025 | Combined Uranium | Health-based | Archived |
| July 1, 2025 | Consumer Confidence Rule | Non-health-based | Addressed (current) |
| March 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| March 1, 2025 | Chlorine | Non-health-based | Resolved |
| February 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| February 1, 2025 | Chlorine | Non-health-based | Resolved |
| January 1, 2025 | Revised Total Coliform Rule | Non-health-based | Resolved |
| January 1, 2025 | Chlorine | Non-health-based | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Chlorine | Monitoring & Reporting | 8 | No |
| Chlorine | Monitoring & Reporting | 6 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 2 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 2 | No |
| Gross Alpha | MCL Violation | 2 | Yes |
| Combined Uranium | MCL Violation | 2 | Yes |
| Stage 2 DBP Rule | Treatment Technique | 2 | Yes |
| Consumer Confidence Rule | Other (notice or report rule) | 2 | No |
| Public Notice | Other (notice or report rule) | 2 | No |
| Lead | Inorganic | 1 | No |
| Stage 1 DBP Rule | Treatment Technique | 1 | No |
Health Risk Details
Gross Alpha Particle Activity (EPA limit: pCi/L)
Increased cancer risk from radioactive particles At-risk groups: long-term residents in areas with uranium or radium-rich geology, people on private wells in western US.
Treatment options (verify a product is certified to reduce this contaminant): reverse osmosis, ion exchange, lime softening. Find the right filter →
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.003 mg/L | No | 2025-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
1 of 1 ZIP records with known zones is 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.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by NC or modeled from parcel and building-footprint data.
- 27545 - Knightdale
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Rockbridge S/d (NC4092073) on EPA.gov.
Frequently Asked Questions
Is Rockbridge S/d water safe to drink?
The accepted 2026Q2 ECHO snapshot shows 4 current noncompliance records and zero current records classified as health-based. That classification is not a property-specific water test or safety guarantee.
How many people does Rockbridge S/d serve?
Rockbridge S/d serves approximately 1,042 people across 1 ZIP code in North Carolina.
Where does Rockbridge S/d get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Rockbridge S/d (NC): 5 Health Violations. https://zipcheckup.com/water-system/nc4092073/
@misc{zipcheckup-water-system-nc4092073,
author = {{ZipCheckup}},
title = {{Rockbridge S/d (NC): 5 Health Violations}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/nc4092073/}
}
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Rockbridge S/d (EPA ID: NC4092073) - request the latest Consumer Confidence Report or ask about specific contaminants.