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CASTLE BAY S/D

PWS ID: NC7071018 · CARY, North Carolina 27511

CASTLE BAY S/D serves 777 people in CARY, North Carolina using Groundwater water sources. It has 196 recorded EPA violations, including 87 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: CASTLE BAY S/D

CASTLE BAY S/D is a private-owned community water system that delivers drinking water to 777 residents in CARY, North Carolina (Pender County) through 306 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 196 total violations for this system , of which 87 (44%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 85 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Total Haloacetic Acids (HAA5), recorded in 59 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. CASTLE BAY S/D's 196 violations sit above the North Carolina average. Statewide, 174 of 287 UCMR5-tested systems have reported PFAS detections (60.6%). 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
777
Total Violations
196
Health-Based Violations
87
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
306
County
Pender
School/Daycare
No
MCL Violations
86
Monitoring Violations
85
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MCL 59 2013
TTHM MCL 27 2013
Public Notice Other 15 2007
Gross Alpha, Excl. Radon and U MR 13 2004
Combined Radium (-226 and -228) MR 10 2004
Combined Uranium MR 10 2004
TTHM MR 9 2022
Total Haloacetic Acids (HAA5) MR 8 2022
Coliform (TCR) MR 6 2004
Revised Total Coliform Rule RPT 5 2024
Tritium MR 4 2004
Radium-226 MR 4 2004
Radium-228 MR 4 2004
53-IODINE-131 MR 4 2004
38-STRONTIUM-90 MR 4 2004
Gross Beta Particle Activity MR 3 2004
Chlorine MR 3 2004
Lead and Copper Rule MR 3 2004
Consumer Confidence Rule Other 2 2005
Lead and Copper Rule TT 1 2006

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 CASTLE BAY 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 NC7071018 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 CASTLE BAY 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
2024 Revised Total Coliform Rule RPT 5 SDWIS / NC7071018 / 8000
2022 TTHM MR 9 SDWIS / NC7071018 / 2950
2022 Total Haloacetic Acids (HAA5) MR 8 SDWIS / NC7071018 / 2456
2013 Total Haloacetic Acids (HAA5) MCL 59 SDWIS / NC7071018 / 2456
2013 TTHM MCL 27 SDWIS / NC7071018 / 2950
2007 Public Notice Other 15 SDWIS / NC7071018 / 7500
2006 Lead and Copper Rule TT 1 SDWIS / NC7071018 / 5000
2005 Consumer Confidence Rule Other 2 SDWIS / NC7071018 / 7000
2004 Gross Alpha, Excl. Radon and U MR 13 SDWIS / NC7071018 / 4000
2004 Combined Radium (-226 and -228) MR 10 SDWIS / NC7071018 / 4010
2004 Combined Uranium MR 10 SDWIS / NC7071018 / 4006
2004 Coliform (TCR) MR 6 SDWIS / NC7071018 / 3100
2004 Tritium MR 4 SDWIS / NC7071018 / 4102
2004 Radium-226 MR 4 SDWIS / NC7071018 / 4020
2004 Radium-228 MR 4 SDWIS / NC7071018 / 4030

How CASTLE BAY S/D Compares

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

Metric CASTLE BAY S/D North Carolina avg Federal benchmark
Total violations 196 104.4 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 87 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 777 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is CASTLE BAY S/D water safe to drink? ▼
CASTLE BAY S/D (PWS ID: NC7071018) has 196 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 777 people using Groundwater sources.
How many people does CASTLE BAY S/D serve? ▼
CASTLE BAY S/D serves 777 people in CARY, North Carolina. It is a Private-owned system using Groundwater water sources with 306 service connections.
What type of violations does CASTLE BAY S/D have? ▼
CASTLE BAY S/D has 196 total violations: 87 health-based violations (MCL exceedances or treatment failures), 85 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in CASTLE BAY S/D water? ▼
No PFAS testing data is available for CASTLE BAY S/D under the EPA's UCMR5 monitoring program.
What water source does CASTLE BAY S/D use? ▼
CASTLE BAY 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.

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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.

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial