Community Water System · PWS MO6036101
Frontier Estates
Operator location Fenton, Missouri - 24% of 257 violations are health-based (upper-third health share (> 23%)); groundwater source; 120 served per SDWIS.
- 120
- People served (this PWS)
- 257
- EPA violations (this PWS)
- 61
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Frontier Estates standing, high SDWIS violation third
24% of 257 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 24% is upper-third health share (> 23%).
The verdict
Frontier Estates sits in the upper third of the sitemap cohort by violation count (257), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (120; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 24% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- 257
- Total EPA violations on record
- 24%
- Health-based (MCL / treatment failure)
- 120
- People served by this PWS (SDWIS)
- N/A
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 48
- County
- Jefferson
- School/Daycare
- No
- MCL Violations
- 56
- Monitoring Violations
- 167
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 85 | 2012 |
| Coliform (TCR) | MCL | 50 | 2004 |
| Combined Radium (-226 and -228) | MCL | 6 | 2023 |
| Nitrate-Nitrite | MR | 6 | 2000 |
| Consumer Confidence Rule | Other | 5 | 2004 |
| Groundwater Rule | TT | 5 | 2015 |
| E. COLI | MR | 4 | 2012 |
| Revised Total Coliform Rule | MON | 4 | 2020 |
| Gross Alpha, Excl. Radon and U | MR | 3 | 1996 |
| Mercury | MR | 2 | 1999 |
| Selenium | MR | 2 | 1999 |
| Antimony, Total | MR | 2 | 1999 |
| Beryllium, Total | MR | 2 | 1999 |
| Arsenic | MR | 2 | 1999 |
| Barium | MR | 2 | 1999 |
| Xylenes, Total | MR | 2 | 1999 |
| DICHLOROMETHANE | MR | 2 | 1999 |
| o-Dichlorobenzene | MR | 2 | 1999 |
| Chromium | MR | 2 | 1999 |
| Vinyl chloride | MR | 2 | 1999 |
| Fluoride | MR | 2 | 1999 |
| trans-1,2-Dichloroethylene | MR | 2 | 1999 |
| 1,2-Dichloroethane | MR | 2 | 1999 |
| 1,1,1-Trichloroethane | MR | 2 | 1999 |
| Nickel | MR | 2 | 1999 |
| Trichloroethylene | MR | 2 | 1999 |
| Benzene | MR | 2 | 1999 |
| Thallium, Total | MR | 2 | 1999 |
| Toluene | MR | 2 | 1999 |
| Styrene | MR | 2 | 1999 |
Violation Count vs. the National Corpus
Frontier Estates has 257 recorded EPA violations, 89% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 11% carry more. 24% of this system's own violations are health-based (61 of 257), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
257 Higher than most more violations than 89% 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 Frontier Estates
61 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MO6036101.
Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch
Nationwide peers
257 violations · 120 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.
What to do with Frontier Estates
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.