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TANGLEWOOD ON TEXOMA

PWS ID: TX0910052 · AUSTIN, Texas 78714-0164

TANGLEWOOD ON TEXOMA serves 4,341 people in AUSTIN, Texas using Surface Water water sources. It has 109 recorded EPA violations, including 43 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (7 compounds found).

Water Quality Snapshot: TANGLEWOOD ON TEXOMA

TANGLEWOOD ON TEXOMA is a private-owned community water system that delivers drinking water to 4,341 residents in AUSTIN, Texas (Grayson County) through 1,515 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 109 total violations for this system , of which 43 (39%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 64 monitoring and reporting violations are on file. The most recent violation on record dates to 2015.

The most frequently cited contaminant at this system is TTHM, recorded in 43 violations (MCL, health-based). Under EPA's UCMR5 PFAS monitoring program, 7 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 40.3 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

Across Texas, EPA tracks 7,351 public water systems serving 33,253,313 people, with 746,210 cumulative violations and 162,945 health-based violations on record. About 90% of systems in the state carry at least one violation, and state-wide the average per system is 101.5 violations. TANGLEWOOD ON TEXOMA's 109 violations sit above the Texas average. Statewide, 1,068 of 1,147 UCMR5-tested systems have reported PFAS detections (93.1%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
4,341
Total Violations
109
Health-Based Violations
43
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
1,515
County
Grayson
School/Daycare
No
MCL Violations
43
Monitoring Violations
64
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 43 2015
1,2,4-Trichlorobenzene MR 3 2009
Xylenes, Total MR 3 2009
o-Dichlorobenzene MR 3 2009
1,1-Dichloroethylene MR 3 2009
1,1,1-Trichloroethane MR 3 2009
Tetrachloroethylene MR 3 2009
Benzene MR 3 2009
Styrene MR 3 2009
DICHLOROMETHANE MR 3 2009
Ethylbenzene MR 3 2009
1,2-Dichloroethane MR 3 2009
CHLOROBENZENE MR 3 2009
cis-1,2-Dichloroethylene MR 3 2009
p-Dichlorobenzene MR 3 2009
Toluene MR 3 2009
Vinyl chloride MR 3 2009
1,1,2-Trichloroethane MR 3 2009
Carbon tetrachloride MR 3 2009
trans-1,2-Dichloroethylene MR 3 2009
1,2-Dichloropropane MR 3 2009
Trichloroethylene MR 3 2009
Public Notice Other 2 2015
Lead and Copper Rule MR 1 2013

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 21 of 296 samples detected PFAS.

Contaminant Date Result MRL Status
lithium 7/16/2025 10.8000 µg/L 9 µg/L Detected
8:2 FTS 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 7/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 7/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFMPA 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/16/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFDoA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 7/16/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 7/16/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/16/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFPeS 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/16/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 7/16/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 7/16/2025 <0.004 µg/L 0.004 µg/L Not Detected
lithium 7/16/2025 9.7200 µg/L 9 µg/L Detected
8:2 FTS 7/16/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/16/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFTA 7/16/2025 <0.008 µg/L 0.008 µg/L Not Detected
NMeFOSAA 7/16/2025 <0.006 µg/L 0.006 µg/L Not Detected

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 TANGLEWOOD ON TEXOMA.

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 TX0910052 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Texas Drinking Water Authority

Texas Commission on Environmental Quality (TCEQ) — Drinking Water Watch is the primacy agency that licenses and inspects TANGLEWOOD ON TEXOMA under EPA-delegated authority.

Open TX regulator portal

Source: Texas Commission on Environmental Quality (TCEQ) — Drinking Water Watch

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
2015 TTHM MCL 43 SDWIS / TX0910052 / 2950
2015 Public Notice Other 2 SDWIS / TX0910052 / 7500
2013 Lead and Copper Rule MR 1 SDWIS / TX0910052 / 5000
2009 1,2,4-Trichlorobenzene MR 3 SDWIS / TX0910052 / 2378
2009 Xylenes, Total MR 3 SDWIS / TX0910052 / 2955
2009 o-Dichlorobenzene MR 3 SDWIS / TX0910052 / 2968
2009 1,1-Dichloroethylene MR 3 SDWIS / TX0910052 / 2977
2009 1,1,1-Trichloroethane MR 3 SDWIS / TX0910052 / 2981
2009 Tetrachloroethylene MR 3 SDWIS / TX0910052 / 2987
2009 Benzene MR 3 SDWIS / TX0910052 / 2990
2009 Styrene MR 3 SDWIS / TX0910052 / 2996
2009 DICHLOROMETHANE MR 3 SDWIS / TX0910052 / 2964
2009 Ethylbenzene MR 3 SDWIS / TX0910052 / 2992
2009 1,2-Dichloroethane MR 3 SDWIS / TX0910052 / 2980
2009 CHLOROBENZENE MR 3 SDWIS / TX0910052 / 2989

How TANGLEWOOD ON TEXOMA Compares

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

Metric TANGLEWOOD ON TEXOMA Texas avg Federal benchmark
Total violations 109 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 43 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 7 compounds 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 4,341 4,524 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 7,351 regulated public water systems in Texas.

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 TANGLEWOOD ON TEXOMA water safe to drink? ▼
TANGLEWOOD ON TEXOMA (PWS ID: TX0910052) has 109 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 7 PFAS compounds found. This system serves 4,341 people using Surface Water sources.
How many people does TANGLEWOOD ON TEXOMA serve? ▼
TANGLEWOOD ON TEXOMA serves 4,341 people in AUSTIN, Texas. It is a Private-owned system using Surface Water water sources with 1,515 service connections.
What type of violations does TANGLEWOOD ON TEXOMA have? ▼
TANGLEWOOD ON TEXOMA has 109 total violations: 43 health-based violations (MCL exceedances or treatment failures), 64 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in TANGLEWOOD ON TEXOMA water? ▼
Yes. UCMR5 testing detected 7 PFAS compounds in TANGLEWOOD ON TEXOMA's water supply: lithium, PFHxS, PFHxA, PFBS, PFBA, and others. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does TANGLEWOOD ON TEXOMA use? ▼
TANGLEWOOD ON TEXOMA uses Surface Water 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). 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 PlainWater Editorial