Public Water System

FLAG CREEK RANCH

PWSID TX1500112 · Texas · 117 people served

Poor

FLAG CREEK RANCH is an EPA-regulated public water system in Texas (PWSID TX1500112). It serves an estimated 117 residents — a rural community of customers — across 1 community across 1 ZIP code.

Over the past five years, FLAG CREEK RANCH has recorded 7 EPA health-based violations. The grade of D summarizes this compliance pattern. Specific contaminants, dates, and rule citations are listed in the violation history below.

Service Area

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Approximate state-level location.

Population

117

Cities

ZIPs

Violations

EPA Health-Based Violations

Health-based Maximum Contaminant Level (MCL) violations on file for FLAG CREEK RANCH over the past five years of EPA SDWIS reporting.

Total Trihalomethanes (TTHMs)disinfectant

EPA Code 2950 · Maximum Contaminant Level Exceedance

violations

EPA Limit

0.08 mg/L

Last Reading

.082 MG/L

First Reported

Jul 2025

Most Recent

Jul 2025

What this violation means

Total Trihalomethanes (TTHMs) form when chlorine reacts with naturally occurring organic matter — leaves, soil, algae — in source water. They are among the most commonly reported violations because utilities pulling from surface water (rivers, lakes, reservoirs) struggle to balance disinfection with byproduct formation. Long-term exposure has been linked to bladder cancer and adverse pregnancy outcomes.

Recommended precautions

→Activated carbon filters (pitcher, faucet, or under-sink) effectively reduce TTHMs.
→Letting water sit uncovered allows TTHMs to off-gas — leave a pitcher in the fridge for several hours.
→Shower with the bathroom fan on; TTHMs can volatilize into the air during hot showers.
→Boiling reduces TTHMs through volatilization, but only after extended boiling.

Read the complete guide to Total Trihalomethanes (TTHMs)

Radiumradiological

EPA Code 4000 · Maximum Contaminant Level Exceedance

violations

EPA Limit

5 pCi/L

Last Reading

16 PCI/L

First Reported

Jul 2023

Most Recent

Jul 2023

What this violation means

Radium-226 and Radium-228 occur naturally in groundwater, particularly in regions with granite or sandstone aquifers. Long-term ingestion increases the risk of bone, sinus, and other cancers because radium concentrates in bone tissue.

Recommended precautions

→Reverse osmosis and ion exchange (water softeners) remove radium.
→Boiling does NOT remove radium and may concentrate it.
→Private well users in radium-rich geology should test every 3–5 years.

Read the complete guide to Radium

Source: EPA Safe Drinking Water Information System (SDWIS). Health-based violations only. Older violations may have been resolved; check your utility's most recent Consumer Confidence Report for current status.

Cities Served by FLAG CREEK RANCH

DES PERES

ZIP Codes Served

63131

About this system

EPA records this system as PWSID TX1500112. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact FLAG CREEK RANCH directly or review their annual Consumer Confidence Report (CCR).