Cassie Water System

PWSID: TX0270047

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3 active health-based violations
This system currently has unresolved violations for: 0200, 5000. These violations mean contaminant levels exceeded EPA limits or required treatment was not performed.

This system has more violations on record than 99% of water systems in Missouri.

Violation trend: 126.2 per year over the last 5 years, up from 25.2 per year in the previous 5.

System Details

Population Served106
Service Connections66
Water SourceGroundwater Under Influence
System TypeCommunity Water System
OwnerPrivate
StatusActive
CityDes Peres
EPA ZIP on File63131-1871

Lead & Copper Testing

ContaminantLevelEPA Action LevelStatus
Copper (90th percentile)5.8400 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)3.2000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)3.1000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)3.0800 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.8500 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.8000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.6000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.5900 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.4000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.1000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.1000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.1000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)2.0000 mg/L1.300 mg/LExceeds Action Level
Copper (90th percentile)1.9000 mg/L1.300 mg/LExceeds Action Level
Lead (90th percentile)0.0524 mg/L0.015 mg/LExceeds Action Level
Lead (90th percentile)0.0327 mg/L0.015 mg/LExceeds Action Level
Lead (90th percentile)0.0117 mg/L0.015 mg/LBelow Action Level
Lead (90th percentile)0.0063 mg/L0.015 mg/LBelow Action Level
Lead (90th percentile)0.0054 mg/L0.015 mg/LBelow Action Level
Lead (90th percentile)0.0047 mg/L0.015 mg/LBelow Action Level

8 Active Violations

ContaminantViolationDateHealth-BasedStatus
7500Other2025-08-31Open
7500Other2025-08-31Open
7500Other2025-07-31Open
7500Other2025-07-31Open
7500Other2020-01-31Open
0200TT2019-11-01YesOpen
0200TT2019-11-01YesOpen
5000TT2019-07-01YesOpen

Violation History (773 total)

ContaminantViolationDateHealth-BasedStatus
0800TT2025-08-01YesAcknowledged
0800TT2025-08-01YesAcknowledged
0300MR2025-08-01 MajorAcknowledged
0300MR2025-08-01 MajorAcknowledged
7500Other2025-07-01Returned to Compliance
7500Other2025-07-01Returned to Compliance
7500Other2025-07-01Returned to Compliance
7500Other2025-07-01Returned to Compliance
0800TT2025-07-01YesAcknowledged
0800TT2025-07-01YesAcknowledged
0300MR2025-07-01 MajorAcknowledged
0300MR2025-07-01 MajorAcknowledged
0800TT2025-06-01YesAcknowledged
0800TT2025-06-01YesAcknowledged
0800TT2025-06-01YesAcknowledged
0800TT2025-06-01YesAcknowledged
0300MR2025-06-01 MajorAcknowledged
0300MR2025-06-01 MajorAcknowledged
0300MR2025-06-01 MajorAcknowledged
0300MR2025-06-01 MajorAcknowledged
7500Other2025-05-31Returned to Compliance
7500Other2025-05-31Returned to Compliance
0800TT2025-05-01YesAcknowledged
0800TT2025-05-01YesAcknowledged
0300MR2025-05-01 MajorAcknowledged
0300MR2025-05-01 MajorAcknowledged
0800TT2025-04-01YesAcknowledged
0800TT2025-04-01YesAcknowledged
0300MR2025-04-01 MajorAcknowledged
0300MR2025-04-01 MajorAcknowledged
7500Other2025-03-31Returned to Compliance
7500Other2025-03-31Returned to Compliance
7500Other2025-03-03Returned to Compliance
7500Other2025-03-03Returned to Compliance
0800TT2025-03-01YesAcknowledged
0800TT2025-03-01YesAcknowledged
0800TT2025-03-01YesAcknowledged
0800TT2025-03-01YesAcknowledged
0300MR2025-03-01 MajorAcknowledged
0300MR2025-03-01 MajorAcknowledged
0300MR2025-03-01 MajorAcknowledged
0300MR2025-03-01 MajorAcknowledged
0800TT2025-02-01YesAcknowledged
0800TT2025-02-01YesAcknowledged
0800TT2025-02-01YesAcknowledged
0800TT2025-02-01YesAcknowledged
0300MR2025-02-01 MajorAcknowledged
0300MR2025-02-01 MajorAcknowledged
0300MR2025-02-01 MajorAcknowledged
0300MR2025-02-01 MajorAcknowledged

Showing 50 of 765 historical violations.

Understanding This Water System's Record

Cassie Water System is a community water system water system that draws from groundwater under influence sources and serves a population of 106 in Des Peres, Missouri. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.

What Do These Violations Mean?

Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.

What Should You Do?

Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.