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THUNDERBIRD UTILITY DISTRICT 1

PWS ID: TX0790033 · MISSOURI CITY, Texas 77459-2543

THUNDERBIRD UTILITY DISTRICT 1 serves 4,203 people in MISSOURI CITY, Texas using Groundwater water sources. It has 44 recorded EPA violations, including 0 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: THUNDERBIRD UTILITY DISTRICT 1

THUNDERBIRD UTILITY DISTRICT 1 is a local-owned community water system that delivers drinking water to 4,203 residents in MISSOURI CITY, Texas (Fort Bend County) through 1,401 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 44 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 44 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 4 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 21 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. THUNDERBIRD UTILITY DISTRICT 1's 44 violations sit below 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

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

Population Served
4,203
Total Violations
44
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,401
County
Fort Bend
School/Daycare
No
MCL Violations
0
Monitoring Violations
44
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 4 2007
Lead and Copper Rule MR 2 2013
Atrazine MR 1 2022
Arsenic MR 1 2021
Thallium, Total MR 1 2021
Chromium MR 1 2021
Aldicarb sulfoxide MR 1 2021
ETHYLENE DIBROMIDE MR 1 2021
Barium MR 1 2021
Chlordane MR 1 2022
1,2-DIBROMO-3-CHLOROPROPANE MR 1 2021
2,4,5-TP MR 1 2021
Aldicarb sulfone MR 1 2021
BHC-GAMMA MR 1 2022
OXAMYL MR 1 2021
Cadmium MR 1 2021
Benzo(a)pyrene MR 1 2022
Di(2-ethylhexyl) phthalate MR 1 2022
Heptachlor MR 1 2022
Toxaphene MR 1 2022
Mercury MR 1 2021
Heptachlor epoxide MR 1 2022
2,4-D MR 1 2021
Methoxychlor MR 1 2022
Di(2-ethylhexyl) adipate MR 1 2022
Endrin MR 1 2022
Picloram MR 1 2021
Carbofuran MR 1 2021
Hexachlorocyclopentadiene MR 1 2022
Selenium MR 1 2021

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFBA 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
HFPO-DA 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/16/2024 <0.02 µg/L 0.02 µg/L Not Detected
ADONA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 4/16/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
lithium 4/16/2024 21.0000 µg/L 9 µg/L Detected
PFHxS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 4/16/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 4/16/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 4/16/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFMBA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 4/16/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 4/16/2024 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 4/16/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFHxA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 4/16/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 4/16/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 4/16/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 4/16/2024 <0.003 µg/L 0.003 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 THUNDERBIRD UTILITY DISTRICT 1.

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 TX0790033 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 THUNDERBIRD UTILITY DISTRICT 1 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
2022 Atrazine MR 1 SDWIS / TX0790033 / 2050
2022 Chlordane MR 1 SDWIS / TX0790033 / 2959
2022 BHC-GAMMA MR 1 SDWIS / TX0790033 / 2010
2022 Benzo(a)pyrene MR 1 SDWIS / TX0790033 / 2306
2022 Di(2-ethylhexyl) phthalate MR 1 SDWIS / TX0790033 / 2039
2022 Heptachlor MR 1 SDWIS / TX0790033 / 2065
2022 Toxaphene MR 1 SDWIS / TX0790033 / 2020
2022 Heptachlor epoxide MR 1 SDWIS / TX0790033 / 2067
2022 Methoxychlor MR 1 SDWIS / TX0790033 / 2015
2022 Di(2-ethylhexyl) adipate MR 1 SDWIS / TX0790033 / 2035
2022 Endrin MR 1 SDWIS / TX0790033 / 2005
2022 Hexachlorocyclopentadiene MR 1 SDWIS / TX0790033 / 2042
2022 HEXACHLOROBENZENE MR 1 SDWIS / TX0790033 / 2274
2022 Pentachlorophenol MR 1 SDWIS / TX0790033 / 2326
2022 LASSO MR 1 SDWIS / TX0790033 / 2051

How THUNDERBIRD UTILITY DISTRICT 1 Compares

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

Metric THUNDERBIRD UTILITY DISTRICT 1 Texas avg Federal benchmark
Total violations 44 101.5 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 22.2 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 93.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 4,203 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 THUNDERBIRD UTILITY DISTRICT 1 water safe to drink? ▼
THUNDERBIRD UTILITY DISTRICT 1 (PWS ID: TX0790033) has 44 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 4,203 people using Groundwater sources.
How many people does THUNDERBIRD UTILITY DISTRICT 1 serve? ▼
THUNDERBIRD UTILITY DISTRICT 1 serves 4,203 people in MISSOURI CITY, Texas. It is a Local-owned system using Groundwater water sources with 1,401 service connections.
What type of violations does THUNDERBIRD UTILITY DISTRICT 1 have? ▼
THUNDERBIRD UTILITY DISTRICT 1 has 44 total violations: 0 health-based violations (MCL exceedances or treatment failures), 44 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in THUNDERBIRD UTILITY DISTRICT 1 water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in THUNDERBIRD UTILITY DISTRICT 1's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does THUNDERBIRD UTILITY DISTRICT 1 use? ▼
THUNDERBIRD UTILITY DISTRICT 1 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. 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