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Community Water System · PWS NC4392157

Wilders Ridge S/D

Cary, North Carolina 27511 - drinking water served from groundwater sources to 518 people, tracked in EPA SDWIS and UCMR5.

518
People served
56
EPA violations
37
Health-based
Untested
UCMR5 result

The verdict

EPA records 56 drinking-water violations at Wilders Ridge S/D, 66% of them health-based - below the North Carolina per-system average.

56
Total EPA violations on record
66%
Health-based (MCL / treatment failure)
518
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Wilders Ridge S/D

Wilders Ridge S/D is a private-owned community water system that delivers drinking water to 518 residents in Cary, North Carolina (Wake County) through 204 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 56 total violations for this system , of which 37 (66%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 7 monitoring and reporting violations are on file. The most recent violation on record dates to 2009.

The most frequently cited contaminant at this system is Combined Radium (-226 and -228), recorded in 37 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across North Carolina, EPA tracks 5,020 public water systems serving 9,877,724 people, with 524,053 cumulative violations and 38,492 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 104.4 violations. Statewide, 174 of 287 UCMR5-tested systems have reported PFAS detections (60.6%).

Wilders Ridge S/D's 56 violations sit below the North Carolina average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
518
Total Violations
56
Health-Based Violations
37
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
204
County
Wake
School/Daycare
No
MCL Violations
37
Monitoring Violations
7
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Combined Radium (-226 and -228) MCL 37 2008
Public Notice Other 9 2009
Coliform (TCR) MR 4 2007
Consumer Confidence Rule Other 3 2002
Chlorine MR 3 2007

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Wilders Ridge S/D.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID NC4392157 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

North Carolina Drinking Water Authority

North Carolina DEQ, Public Water Supply Section is the primacy agency that licenses and inspects Wilders Ridge S/D under EPA-delegated authority.

Open NC regulator portal

Source: North Carolina DEQ, Public Water Supply Section

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2009 Public Notice Other 9 SDWIS / NC4392157 / 7500
2008 Combined Radium (-226 and -228) MCL 37 SDWIS / NC4392157 / 4010
2007 Coliform (TCR) MR 4 SDWIS / NC4392157 / 3100
2007 Chlorine MR 3 SDWIS / NC4392157 / 0999
2002 Consumer Confidence Rule Other 3 SDWIS / NC4392157 / 7000

How Wilders Ridge S/D Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Wilders Ridge S/D North Carolina avg Federal benchmark
Total violations 56 104.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 37 7.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 60.6% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 518 1,968 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,020 regulated public water systems in North Carolina.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Wilders Ridge S/D water safe to drink? ▼
Wilders Ridge S/D (PWS ID: NC4392157) has 56 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 518 people using Groundwater sources.
How many people does Wilders Ridge S/D serve? ▼
Wilders Ridge S/D serves 518 people in Cary, North Carolina. It is a Private-owned system using Groundwater water sources with 204 service connections.
What type of violations does Wilders Ridge S/D have? ▼
Wilders Ridge S/D has 56 total violations: 37 health-based violations (MCL exceedances or treatment failures), 7 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Wilders Ridge S/D water? ▼
No PFAS testing data is available for Wilders Ridge S/D under the EPA's UCMR5 monitoring program.
What water source does Wilders Ridge S/D use? ▼
Wilders Ridge S/D uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.