Community Water System · PWSID TX1500112

Flag Creek Ranch

Serves 117 peopleGroundwaterOwner: PrivateDes Peres, Missouri
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 2022: 15 violations. 2 over the limit · 8 missed or late tests · 5 notices or reports. Most recent began 2025-07-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

2Over the limit
0Treatment lapse
8Missed or late test
5Notice or report1 open

More violations on record than 83% of active water systems in Missouri. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052010201520202022 · Missed or late test: 22022 · Missed or late test: 22023 · Over the limit: 12023 · Missed or late test: 12023 · Notice or report: 22023 · Notice or report: 22024 · Missed or late test: 42024 · Missed or late test: 42024 · Missed or late test: 42024 · Missed or late test: 42024 · Notice or report: 22024 · Notice or report: 22025 · Over the limit: 12025 · Missed or late test: 12025 · Notice or report: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
13% over the limit · 253% missed or late test · 833% notice or report · 5

Across Missouri, 54% of violations are missed or late tests and 8% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)Gross Alpha, Excl. Radon and U2025-07-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2023-07-01 · Gross Alpha, Excl. Radon and U: measured 16.00 PCI/L vs limit 15.00 PCI/L (1.1×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 1 result on file · action level 15 ppb

1.1 ppb

Open now (1)

  1. 2024-01-29Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-04-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  3. 2025-02-04Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  4. 2024-07-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  5. 2024-02-01Revised Total Coliform RuleMONBack in compliance
  6. 2024-01-29Public NoticePN Violation for NPDWR ViolationOpen
  7. 2024-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
  8. 2024-01-01Combined UraniumMonitoring, RegularBack in compliance
  9. 2024-01-01Gross Alpha, Excl. Radon and UMonitoring, RegularBack in compliance
  10. 2023-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  11. 2023-08-20Public NoticePN Violation for NPDWR ViolationBack in compliance
  12. 2023-07-01Gross Alpha, Excl. Radon and UMCL, Averagemeasured 16.00 PCI/L · limit 15.00 PCI/LBack in compliance
  13. 2023-07-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2022-06-01Revised Total Coliform RuleMONBack in compliance
  15. 2022-04-01NitrateMonitoring, RegularBack in compliance

System details

Population served117
Service connections40
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityDes Peres
EPA ZIP on file63131-1871

Areas served

  • Llano County

Reading this record

Flag Creek Ranch is a community water system that draws from groundwater and serves about 117 people in Des Peres, Missouri. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.