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Community Water System · PWS NC0464050

Middlesex Water System

Raleigh, North Carolina 27609 - drinking water served from groundwater sources to 1,389 people, tracked in EPA SDWIS and UCMR5.

1,389
People served
392
EPA violations
35
Health-based
Untested
UCMR5 result

The verdict

EPA records 392 drinking-water violations at Middlesex Water System, 9% of them health-based - above the North Carolina per-system average.

392
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
1,389
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Middlesex Water System

Middlesex Water System is a local-owned community water system that delivers drinking water to 1,389 residents in Raleigh, North Carolina (Nash County) through 551 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 392 total violations for this system , of which 35 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 287 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 30 violations (MR). 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%).

Middlesex Water System's 392 violations sit above 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
1,389
Total Violations
392
Health-Based Violations
35
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
551
County
Nash
School/Daycare
No
MCL Violations
35
Monitoring Violations
287
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 30 2023
1,1-Dichloroethylene MCL 27 2011
Total Haloacetic Acids (HAA5) MR 24 2024
TTHM MR 22 2024
Public Notice Other 19 2025
Consumer Confidence Rule Other 16 2023
Coliform (TCR) MR 8 2009
ETHYLENE DIBROMIDE MCL 8 2023
o-Dichlorobenzene MR 7 2004
DICHLOROMETHANE MR 7 2004
Xylenes, Total MR 7 2004
Benzene MR 7 2004
CHLOROBENZENE MR 7 2004
Tetrachloroethylene MR 7 2004
Trichloroethylene MR 7 2004
Carbon tetrachloride MR 7 2004
trans-1,2-Dichloroethylene MR 7 2004
cis-1,2-Dichloroethylene MR 7 2004
Vinyl chloride MR 7 2004
1,2-Dichloropropane MR 7 2004
1,1,1-Trichloroethane MR 7 2004
1,2-Dichloroethane MR 7 2004
Styrene MR 7 2004
Ethylbenzene MR 7 2004
Toluene MR 7 2004
1,1,2-Trichloroethane MR 7 2004
1,2,4-Trichlorobenzene MR 7 2004
p-Dichlorobenzene MR 7 2004
1,1-Dichloroethylene MR 7 2004
2,4-D MR 6 2011

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 Middlesex Water System.

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 NC0464050 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 Middlesex Water System 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
2025 Public Notice Other 19 SDWIS / NC0464050 / 7500
2025 Chlordane MR 4 SDWIS / NC0464050 / 2959
2024 Total Haloacetic Acids (HAA5) MR 24 SDWIS / NC0464050 / 2456
2024 TTHM MR 22 SDWIS / NC0464050 / 2950
2023 Lead and Copper Rule MR 30 SDWIS / NC0464050 / 5000
2023 Consumer Confidence Rule Other 16 SDWIS / NC0464050 / 7000
2023 ETHYLENE DIBROMIDE MCL 8 SDWIS / NC0464050 / 2946
2013 Heptachlor epoxide MR 5 SDWIS / NC0464050 / 2067
2011 1,1-Dichloroethylene MCL 27 SDWIS / NC0464050 / 2977
2011 2,4-D MR 6 SDWIS / NC0464050 / 2105
2011 2,4,5-TP MR 6 SDWIS / NC0464050 / 2110
2011 Dinoseb MR 6 SDWIS / NC0464050 / 2041
2011 Picloram MR 6 SDWIS / NC0464050 / 2040
2011 Dalapon MR 6 SDWIS / NC0464050 / 2031
2011 Pentachlorophenol MR 6 SDWIS / NC0464050 / 2326

How Middlesex Water System Compares

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

Metric Middlesex Water System North Carolina avg Federal benchmark
Total violations 392 104.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 35 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 1,389 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 Middlesex Water System water safe to drink? ▼
Middlesex Water System (PWS ID: NC0464050) has 392 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,389 people using Groundwater sources.
How many people does Middlesex Water System serve? ▼
Middlesex Water System serves 1,389 people in Raleigh, North Carolina. It is a Local-owned system using Groundwater water sources with 551 service connections.
What type of violations does Middlesex Water System have? ▼
Middlesex Water System has 392 total violations: 35 health-based violations (MCL exceedances or treatment failures), 287 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Middlesex Water System water? ▼
No PFAS testing data is available for Middlesex Water System under the EPA's UCMR5 monitoring program.
What water source does Middlesex Water System use? ▼
Middlesex Water System 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.