Community Water System · PWS AR0000199
Denning Waterworks
Operator location Ozark, Arkansas - smaller served population (≤ 999) at 712 people served; 129 SDWIS violations on record from surface water sources.
- 712
- People served (this PWS)
- 129
- EPA violations (this PWS)
- 8
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Denning Waterworks standing, high SDWIS violation third
712 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 6% is middle-third health share (≤ 23%). Population rank #24,071 of 29,740 among systems serving 500+.
The verdict
Denning Waterworks sits in the upper third of the sitemap cohort by violation count (129), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (712; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 6% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #24,071 of 29,740
- Population · /systems
- #438 of 514
- Population · AR
- 129
- Total EPA violations on record
- 6%
- 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
- 285
- County
- Franklin
- School/Daycare
- No
- MCL Violations
- 8
- Monitoring Violations
- 87
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 68 | 2014 |
| Surface Water Treatment Rule | MR | 18 | 2005 |
| Public Notice | Other | 9 | 2020 |
| Coliform (TCR) | MCL | 8 | 2014 |
| Consumer Confidence Rule | Other | 7 | 2013 |
| Revised Total Coliform Rule | RPT | 2 | 2018 |
| Coliform (TCR) | Other | 1 | 1992 |
| Surface Water Treatment Rule | Other | 1 | 1994 |
| Revised Total Coliform Rule | MON | 1 | 2019 |
Violation Count vs. the National Corpus
Denning Waterworks has 129 recorded EPA violations, 78% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 22% carry more. 6% of this system's own violations are health-based (8 of 129), and it ranks #24,071 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)
129 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
Population served record for Denning Waterworks
EPA SDWIS lists 712 people served and 285 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
129 violations · 712 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 Denning Waterworks
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Arkansas compares on the same EPA violation measures. Arkansas 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.