Community Water System · PWS PR0004925
Farallon
Operator location Cayey, Puerto Rico - larger served population (> 3,309) at 38,977 people served; 390 SDWIS violations on record from surface water sources.
- 38,977
- People served (this PWS)
- 390
- EPA violations (this PWS)
- 43
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Farallon standing, high SDWIS violation third
38,977 people served (SDWIS) - larger served population (> 3,309). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 11% is middle-third health share (≤ 23%). Population rank #1,441 of 29,740 among systems serving 500+.
The verdict
Farallon sits in the upper third of the sitemap cohort by violation count (390), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (38,977; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 11% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.
- #1,441 of 29,740
- Population · /systems
- #14 of 235
- Population · PR
- 390
- Total EPA violations on record
- 11%
- 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
- 14,598
- County
- Cayey Municipio
- School/Daycare
- No
- MCL Violations
- 6
- Monitoring Violations
- 335
- Treatment Tech Violations
- 37
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TT | 28 | 2023 |
| Lead and Copper Rule | MR | 24 | 2016 |
| Antimony, Total | MR | 21 | 2007 |
| Thallium, Total | MR | 20 | 2007 |
| Arsenic | MR | 16 | 2007 |
| Beryllium, Total | MR | 15 | 2007 |
| Cryptosporidium | MR | 14 | 2018 |
| Chromium | MR | 12 | 2007 |
| Selenium | MR | 12 | 2007 |
| Barium | MR | 12 | 2007 |
| Cadmium | MR | 12 | 2007 |
| Nickel | MR | 12 | 2007 |
| E. COLI | MR | 10 | 2018 |
| Turbidity | MR | 10 | 2018 |
| Coliform (TCR) | MR | 9 | 2014 |
| CARBON, TOTAL | TT | 9 | 2010 |
| Coliform (TCR) | MCL | 6 | 2012 |
| Mercury | MR | 6 | 2007 |
| cis-1,2-Dichloroethylene | MR | 5 | 2017 |
| Vinyl chloride | MR | 5 | 2017 |
| 1,1-Dichloroethylene | MR | 5 | 2017 |
| 1,2-Dichloroethane | MR | 5 | 2017 |
| 1,1,1-Trichloroethane | MR | 5 | 2017 |
| Carbon tetrachloride | MR | 5 | 2017 |
| Tetrachloroethylene | MR | 5 | 2017 |
| CHLOROBENZENE | MR | 5 | 2017 |
| 1,2,4-Trichlorobenzene | MR | 5 | 2017 |
| Xylenes, Total | MR | 5 | 2017 |
| p-Dichlorobenzene | MR | 5 | 2017 |
| trans-1,2-Dichloroethylene | MR | 5 | 2017 |
Violation Count vs. the National Corpus
Farallon has 390 recorded EPA violations, 93% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 7% carry more. 11% of this system's own violations are health-based (43 of 390), and it ranks #1,441 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)
390 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
Population served record for Farallon
EPA SDWIS lists 38,977 people served and 14,598 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
390 violations · 38,977 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 Farallon
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.