Community Water System · PWS LA1107004
St Joseph Water System
Operator location St Joseph, Louisiana - 36% of 381 violations are health-based (upper-third health share (> 23%)); groundwater source; 1,332 served per SDWIS.
- 1,332
- People served (this PWS)
- 381
- EPA violations (this PWS)
- 137
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
St Joseph Water System standing, high SDWIS violation third
36% of 381 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 36% is upper-third health share (> 23%). Population rank #16,956 of 29,740 among systems serving 500+.
The verdict
St Joseph Water System sits in the upper third of the sitemap cohort by violation count (381), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,332 (mid served population (≤ 3,309)). Health-based share is 36% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #16,956 of 29,740
- Population · /systems
- #458 of 707
- Population · LA
- 381
- Total EPA violations on record
- 36%
- 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
- 444
- County
- Tensas Parish
- School/Daycare
- No
- MCL Violations
- 117
- Monitoring Violations
- 75
- Treatment Tech Violations
- 20
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 92 | 2024 |
| TTHM | MCL | 82 | 2020 |
| Public Notice | Other | 57 | 2024 |
| Coliform (TCR) | MR | 34 | 2015 |
| Total Haloacetic Acids (HAA5) | MCL | 24 | 2019 |
| Groundwater Rule | TT | 19 | 2023 |
| Chlorine | MR | 15 | 2016 |
| Lead and Copper Rule | MR | 8 | 2023 |
| Coliform (TCR) | MCL | 7 | 2007 |
| TTHM | MR | 5 | 2009 |
| Total Haloacetic Acids (HAA5) | MR | 5 | 2009 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 4 | 2010 |
| Revised Total Coliform Rule | MON | 4 | 2016 |
| Revised Total Coliform Rule | MCL | 4 | 2017 |
| LEAD AND COPPER RULE REVISIONS | TT | 1 | 2024 |
Violation Count vs. the National Corpus
St Joseph Water System has 381 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 36% of this system's own violations are health-based (137 of 381), and it ranks #16,956 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)
381 Higher than most more violations than 93% 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 St Joseph Water System
137 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for LA1107004.
Sources: EPA SDWIS
Nationwide peers
381 violations · 1,332 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 near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with St Joseph 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.