Community Water System · PWS PR0004234
Duey
Operator location Yauco, Puerto Rico - upper-third violation load (> 74 violations) with 216 EPA violations; surface water source; 2,368 served (PWS-level, not municipal population).
- 2,368
- People served (this PWS)
- 216
- EPA violations (this PWS)
- 30
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Duey standing, high SDWIS violation third
216 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 14% is middle-third health share (≤ 23%). Population rank #12,375 of 29,740 among systems serving 500+.
The verdict
Duey sits in the upper third of the sitemap cohort by violation count (216), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,368 (mid served population (≤ 3,309)). Health-based share is 14% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #12,375 of 29,740
- Population · /systems
- #118 of 235
- Population · PR
- 216
- Total EPA violations on record
- 14%
- 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
- 887
- County
- Maricao Municipio
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 154
- Treatment Tech Violations
- 18
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 42 | 2016 |
| Total Haloacetic Acids (HAA5) | MCL | 12 | 2018 |
| Surface Water Treatment Rule | TT | 11 | 2005 |
| Long Term 2 Enhanced Surface Water Treatment Rule | TT | 6 | 2025 |
| Consumer Confidence Rule | Other | 5 | 2022 |
| Coliform (TCR) | MR | 4 | 1999 |
| E. COLI | MR | 4 | 2018 |
| OXAMYL | MR | 3 | 2014 |
| Carbofuran | MR | 3 | 2014 |
| BHC-GAMMA | MR | 2 | 2014 |
| Methoxychlor | MR | 2 | 2014 |
| Toxaphene | MR | 2 | 2014 |
| Dalapon | MR | 2 | 2014 |
| Diquat | MR | 2 | 2014 |
| Endothall | MR | 2 | 2014 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2014 |
| Atrazine | MR | 2 | 2014 |
| LASSO | MR | 2 | 2014 |
| Heptachlor | MR | 2 | 2014 |
| 2,4-D | MR | 2 | 2014 |
| 2,4,5-TP | MR | 2 | 2014 |
| HEXACHLOROBENZENE | MR | 2 | 2014 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 2 | 2014 |
| ETHYLENE DIBROMIDE | MR | 2 | 2014 |
| Chlordane | MR | 2 | 2014 |
| Arsenic | MR | 2 | 1984 |
| Nitrate | MR | 2 | 1984 |
| Mercury | MR | 2 | 1984 |
| Fluoride | MR | 2 | 1984 |
| Cadmium | MR | 2 | 1984 |
Violation Count vs. the National Corpus
Duey has 216 recorded EPA violations, 86% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 14% carry more. 14% of this system's own violations are health-based (30 of 216), and it ranks #12,375 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)
216 Higher than most more violations than 86% 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
SDWIS compliance record for Duey
216 violations on record for PR0004234; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
216 violations · 2,368 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 Duey
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.