Community Water System · PWS PR0458234
El Tesoro
Operator location Ponce, Puerto Rico - smaller served population (≤ 999) at 135 people served; 641 SDWIS violations on record from surface water sources.
- 135
- People served (this PWS)
- 641
- EPA violations (this PWS)
- 20
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
El Tesoro standing, high SDWIS violation third
135 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 3% is middle-third health share (≤ 23%).
The verdict
El Tesoro sits in the upper third of the sitemap cohort by violation count (641), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (135; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 3% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- 641
- Total EPA violations on record
- 3%
- Health-based (MCL / treatment failure)
- 135
- 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
- 50
- County
- Ponce Municipio
- School/Daycare
- No
- MCL Violations
- 15
- Monitoring Violations
- 606
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 417 | 2016 |
| Surface Water Treatment Rule | MR | 134 | 2005 |
| Revised Total Coliform Rule | MON | 54 | 2025 |
| Coliform (TCR) | MCL | 15 | 2001 |
| Surface Water Treatment Rule | TT | 3 | 2007 |
| LEAD AND COPPER RULE REVISIONS | TT | 2 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 1 | 2024 |
| Lead and Copper Rule | MR | 1 | 2023 |
Violation Count vs. the National Corpus
El Tesoro has 641 recorded EPA violations, 97% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 3% carry more. 3% of this system's own violations are health-based (20 of 641), 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)
641 Higher than most more violations than 97% 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 El Tesoro
EPA SDWIS lists 135 people served and 50 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
641 violations · 135 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 El Tesoro
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Puerto Rico compares on the same EPA violation measures. Puerto Rico 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.