Community Water System · PWS LA1083006
Rayville Water System
Operator location Rayville, Louisiana - 78% of 409 violations are health-based (upper-third health share (> 23%)); groundwater source; 4,842 served per SDWIS.
- 4,842
- People served (this PWS)
- 409
- EPA violations (this PWS)
- 319
- Health-based (this PWS)
- 1 PFAS
- UCMR5 (this PWS)
Rayville Water System standing, high SDWIS violation third
78% of 409 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 78% is upper-third health share (> 23%). UCMR5: lower-third PFAS panel (≤ 2 compounds). Population rank #7,891 of 29,740 among systems serving 500+.
The verdict
Rayville Water System sits in the upper third of the sitemap cohort by violation count (409), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (4,842; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 78% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 1 PFAS compound (lower-third PFAS panel (≤ 2 compounds)).
- #7,891 of 29,740
- Population · /systems
- #184 of 707
- Population · LA
- 409
- Total EPA violations on record
- 78%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,614
- County
- Richland Parish
- School/Daycare
- No
- MCL Violations
- 278
- Monitoring Violations
- 24
- Treatment Tech Violations
- 41
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 189 | 2019 |
| Total Haloacetic Acids (HAA5) | MCL | 47 | 2019 |
| Coliform (TCR) | MCL | 42 | 2015 |
| Groundwater Rule | TT | 40 | 2022 |
| Public Notice | Other | 29 | 2022 |
| Consumer Confidence Rule | Other | 19 | 2015 |
| TTHM | MR | 11 | 2017 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2011 |
| Lead and Copper Rule | MR | 3 | 2007 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 2 | 2008 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
Violation Count vs. the National Corpus
Rayville Water System has 409 recorded EPA violations, 94% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 6% carry more. 78% of this system's own violations are health-based (319 of 409), and it ranks #7,891 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)
409 Higher than most more violations than 94% 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. 1 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| ADONA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/23/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFUnA | 4/23/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHxA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 4/23/2024 | 3.40 ppt | 3.00 ppt | Detected |
| PFHpA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 4/23/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFOS | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 4/23/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 4/23/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 4/23/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBA | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 4/23/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 6:2 FTS | 4/23/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 4/23/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 10/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDoA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 10/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 10/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 10/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 10/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NMeFOSAA | 10/15/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBS | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 10/15/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFUnA | 10/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFTrDA | 10/15/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFPeS | 10/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 10/15/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 10/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Health-based violations on Rayville Water System
319 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for LA1083006.
Sources: EPA SDWIS
Nationwide peers
409 violations · 4,842 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 similar served population
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Rayville Water System
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Louisiana compares on the same EPA violation measures. Louisiana 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.