Community Water System · PWS PR0004604
Experimental
Operator location Juana Diaz, Puerto Rico - UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)) on this PWS; SDWIS lists 60 violations and 6,427 people served.
- 6,427
- People served (this PWS)
- 60
- EPA violations (this PWS)
- 4
- Health-based (this PWS)
- 7 PFAS
- UCMR5 (this PWS)
Experimental standing, mid SDWIS violation third
UCMR5 detected 7 PFAS compounds - upper-third PFAS panel (> 4 compounds). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 7% is middle-third health share (≤ 23%). UCMR5: upper-third PFAS panel (> 4 compounds). Population rank #6,523 of 29,740 among systems serving 500+.
The verdict
Experimental lands in the middle third by violation volume (60), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is large (6,427; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 7% (middle-third health share (≤ 23%)). UCMR5 detected 7 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- #6,523 of 29,740
- Population · /systems
- #69 of 235
- Population · PR
- 60
- Total EPA violations on record
- 7%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
7 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 2,407
- County
- Juana Diaz Municipio
- School/Daycare
- No
- MCL Violations
- 4
- Monitoring Violations
- 48
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 15 | 2016 |
| Nitrate | MCL | 4 | 2003 |
| Consumer Confidence Rule | Other | 4 | 2020 |
| TTHM | MR | 3 | 2014 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2014 |
| BHC-GAMMA | MR | 2 | 2024 |
| Hexachlorocyclopentadiene | MR | 2 | 2024 |
| Heptachlor epoxide | MR | 2 | 2024 |
| HEXACHLOROBENZENE | MR | 2 | 2024 |
| Endrin | MR | 2 | 2024 |
| Heptachlor | MR | 2 | 2024 |
| Nitrate | MR | 2 | 2024 |
| Toxaphene | MR | 2 | 2024 |
| Methoxychlor | MR | 2 | 2024 |
| Chlordane | MR | 2 | 2024 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2019 |
| Atrazine | MR | 1 | 2019 |
| Glyphosate | MR | 1 | 2019 |
| Benzo(a)pyrene | MR | 1 | 2019 |
| Simazine | MR | 1 | 2019 |
| LASSO | MR | 1 | 2019 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2019 |
Violation Count vs. the National Corpus
Experimental has 60 recorded EPA violations, 61% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 38% carry more. 7% of this system's own violations are health-based (4 of 60), and it ranks #6,523 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)
60 Around the middle fewer violations than 38% 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. 24 of 290 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| 6:2 FTS | 8/20/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 8:2 FTS | 8/20/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeA | 8/20/2024 | 110.00 ppt | 3.00 ppt | Detected |
| PFMBA | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 8/20/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFHpS | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 4:2 FTS | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 8/20/2024 | 54.00 ppt | 5.00 ppt | Detected |
| PFPeS | 8/20/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 8/20/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| HFPO-DA | 8/20/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTrDA | 8/20/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 8/20/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 8/20/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFBS | 8/20/2024 | 42.00 ppt | 3.00 ppt | Detected |
| PFHpA | 8/20/2024 | 13.00 ppt | 3.00 ppt | Detected |
| PFNA | 8/20/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 8/20/2024 | 4.70 ppt | 4.00 ppt | Detected |
| 9Cl-PF3ONS | 8/20/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDA | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 8/20/2024 | 260.00 ppt | 3.00 ppt | Detected |
| PFUnA | 8/20/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 8/20/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 8/20/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NEtFOSAA | 8/20/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 8/20/2024 | 22.00 ppt | 4.00 ppt | Detected |
| PFPeA | 7/10/2024 | 71.60 ppt | 3.00 ppt | Detected |
| PFBS | 7/10/2024 | 30.10 ppt | 3.00 ppt | Detected |
| PFHpA | 7/10/2024 | 8.30 ppt | 3.00 ppt | Detected |
| PFOS | 7/10/2024 | 4.10 ppt | 4.00 ppt | Detected |
| PFOA | 7/10/2024 | 12.90 ppt | 4.00 ppt | Detected |
| PFHxA | 7/10/2024 | 153.40 ppt | 3.00 ppt | Detected |
| PFBA | 7/10/2024 | 38.40 ppt | 5.00 ppt | Detected |
| PFBS | 5/17/2023 | 3.50 ppt | 3.00 ppt | Detected |
| PFDoA | 5/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 5/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 5/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 5/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 5/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpA | 5/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 5/17/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 5/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 5/17/2023 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 5/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 5/17/2023 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 5/17/2023 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFTA | 5/17/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
UCMR5 PFAS record for Experimental
Open EPA SDWIS federal reports for PWS PR0004604 to cross-check UCMR5 detections and violation codes; state primacy agencies enforce the Safe Drinking Water Act locally.
Sources: EPA SDWIS
Nationwide peers
60 violations · 6,427 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
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 Experimental
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.