Community Water System · PWS MO5010860
Willard PWS
Operator location Willard, Missouri - 33% of 72 violations are health-based (upper-third health share (> 23%)); groundwater source; 8,400 served per SDWIS.
- 8,400
- People served (this PWS)
- 72
- EPA violations (this PWS)
- 24
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Willard PWS standing, mid SDWIS violation third
33% of 72 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 33% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #5,415 of 29,740 among systems serving 500+.
The verdict
Willard PWS lands in the middle third by violation volume (72), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (8,400; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 33% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #5,415 of 29,740
- Population · /systems
- #98 of 738
- Population · MO
- 72
- Total EPA violations on record
- 33%
- 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
- 3,567
- County
- Greene
- School/Daycare
- No
- MCL Violations
- 24
- Monitoring Violations
- 43
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 24 | 2009 |
| Coliform (TCR) | MR | 9 | 2000 |
| Carbon tetrachloride | MR | 1 | 1994 |
| p-Dichlorobenzene | MR | 1 | 1994 |
| 1,1,1-Trichloroethane | MR | 1 | 1994 |
| Vinyl chloride | MR | 1 | 1994 |
| 1,2-Dichloropropane | MR | 1 | 1994 |
| Ethylbenzene | MR | 1 | 1994 |
| CHLOROBENZENE | MR | 1 | 1994 |
| o-Dichlorobenzene | MR | 1 | 1994 |
| Styrene | MR | 1 | 1994 |
| Toluene | MR | 1 | 1994 |
| 1,1,2-Trichloroethane | MR | 1 | 1994 |
| trans-1,2-Dichloroethylene | MR | 1 | 1994 |
| Antimony, Total | MR | 1 | 1994 |
| Beryllium, Total | MR | 1 | 1994 |
| Cadmium | MR | 1 | 1994 |
| Mercury | MR | 1 | 1994 |
| Nickel | MR | 1 | 1994 |
| Nitrate-Nitrite | MR | 1 | 1994 |
| Selenium | MR | 1 | 1994 |
| Thallium, Total | MR | 1 | 1994 |
| 1,2-Dichloroethane | MR | 1 | 1994 |
| Trichloroethylene | MR | 1 | 1994 |
| CYANIDE | MR | 1 | 1994 |
| cis-1,2-Dichloroethylene | MR | 1 | 1994 |
| Consumer Confidence Rule | Other | 1 | 2020 |
| Tetrachloroethylene | MR | 1 | 1994 |
| Barium | MR | 1 | 1994 |
| Chromium | MR | 1 | 1994 |
Violation Count vs. the National Corpus
Willard PWS has 72 recorded EPA violations, 66% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 34% carry more. 33% of this system's own violations are health-based (24 of 72), and it ranks #5,415 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)
72 Around the middle fewer violations than 34% 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
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 232 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFMPA | 9/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 9/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 9/20/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 9/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 9/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 9/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 9/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/20/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFNA | 9/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 9/20/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 9/20/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 9/20/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/20/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 6/28/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/28/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| HFPO-DA | 6/28/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 6/28/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 6/28/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 6/28/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 6/28/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFUnA | 6/28/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| 8:2 FTS | 6/28/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 6/28/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 6/28/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 6/28/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 6/28/2023 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFMPA | 6/28/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
Health-based violations on Willard PWS
24 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for MO5010860.
Sources: EPA SDWIS · Missouri DNR, Public Drinking Water Branch
Nationwide peers
72 violations · 8,400 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Willard 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.