Community Water System · PWS MO3010822
Vienna PWS
Operator location Vienna, Missouri - 26% of 125 violations are health-based (upper-third health share (> 23%)); groundwater source; 591 served per SDWIS.
- 591
- People served (this PWS)
- 125
- EPA violations (this PWS)
- 32
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Vienna PWS standing, high SDWIS violation third
26% of 125 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 26% is upper-third health share (> 23%). Population rank #26,713 of 29,740 among systems serving 500+.
The verdict
Vienna PWS sits in the upper third of the sitemap cohort by violation count (125), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (591; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 26% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #26,713 of 29,740
- Population · /systems
- #662 of 738
- Population · MO
- 125
- Total EPA violations on record
- 26%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 321
- County
- Maries
- School/Daycare
- No
- MCL Violations
- 32
- Monitoring Violations
- 55
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 50 | 2007 |
| Coliform (TCR) | MCL | 19 | 2009 |
| Revised Total Coliform Rule | RPT | 15 | 2025 |
| Tetrachloroethylene | MCL | 13 | 2012 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| Revised Total Coliform Rule | MON | 3 | 2024 |
| Nitrate-Nitrite | MR | 1 | 2008 |
| Lead and Copper Rule | MR | 1 | 2013 |
Violation Count vs. the National Corpus
Vienna PWS has 125 recorded EPA violations, 78% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 22% carry more. 26% of this system's own violations are health-based (32 of 125), and it ranks #26,713 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
125 Higher than most more violations than 78% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Vienna PWS
32 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MO3010822.
Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch
Nationwide peers
125 violations · 591 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Vienna PWS
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Missouri compares on the same EPA violation measures. Missouri systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.