Is Guayabota water safe to drink?

Guayabota (PWS ID: PR0005186) has 891 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,028 people using Surface Water sources.

How many people does Guayabota serve?

EPA SDWIS reports that Guayabota serves 1,028 people (this public water system's service population, not the municipal population of Yabucoa or any other city). It is a Local-owned system using Surface Water water sources with 385 service connections. The operator address is listed in Yabucoa, Puerto Rico.

What type of violations does Guayabota have?

Guayabota has 891 total violations: 181 health-based violations (MCL exceedances or treatment failures), 648 monitoring/reporting violations, and 175 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Guayabota water?

No PFAS testing data is available for Guayabota under the EPA's UCMR5 monitoring program.

What water source does Guayabota use?

Guayabota uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Where does Guayabota sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Guayabota ranks #19,171 of 29,740 by people served, and #157 of 235 in Puerto Rico. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Guayabota's violation count compare nationally?

Guayabota has 891 recorded EPA SDWIS violations, fewer than 1% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 99% of that cohort has fewer violations than Guayabota. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Puerto Rico

Community Water System · PWS PR0005186

Guayabota

Operator location Yabucoa, Puerto Rico - upper-third violation load (> 74 violations) with 891 EPA violations; surface water source; 1,028 served (PWS-level, not municipal population).

Compiled by PlainWater · May 15, 2026

1,028
People served (this PWS) Middle third of systems: 891
EPA violations (this PWS) Upper third of systems: 181
Health-based (this PWS) Middle third by health-based share: Untested
UCMR5 (this PWS) No UCMR5 result

Follow published updates (RSS)

Guayabota standing, high SDWIS violation third

891 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 20% is middle-third health share (≤ 23%). Population rank #19,171 of 29,740 among systems serving 500+.

The verdict

Guayabota sits in the upper third of the sitemap cohort by violation count (891), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 1,028 (mid served population (≤ 3,309)). Health-based share is 20% (middle-third health share (≤ 23%)). No UCMR5 PFAS test appears for this system in this extract.

#19,171 of 29,740
Population · /systems: #157 of 235
Population · PR: 891
Total EPA violations on record: 20%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

Water Safety Score

0/100

Guayabota

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations F

181

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

710

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination N/A

Not UCMR5-tested

Highest PFAS compound level detected in UCMR5 testing

System Details

System Type: Community
Owner Type: Local
Connections: 385
County: Yabucoa Municipio
School/Daycare: No
MCL Violations: 6
Monitoring Violations: 648
Treatment Tech Violations: 175

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
Surface Water Treatment Rule	TT	142	2005
Surface Water Treatment Rule	MR	119	2020
Long Term 2 Enhanced Surface Water Treatment Rule	TT	30	2018
1,2-DIBROMO-3-CHLOROPROPANE	MR	15	2013
2,4,5-TP	MR	15	2013
2,4-D	MR	15	2013
Atrazine	MR	15	2013
Carbofuran	MR	15	2013
Di(2-ethylhexyl) adipate	MR	15	2013
Dinoseb	MR	15	2013
Diquat	MR	15	2013
Endrin	MR	15	2013
Glyphosate	MR	15	2013
Heptachlor	MR	15	2013
HEXACHLOROBENZENE	MR	15	2013
Methoxychlor	MR	15	2013
OXAMYL	MR	15	2013
Picloram	MR	15	2013
Simazine	MR	15	2013
Total Polychlorinated Biphenyls (PCB)	MR	15	2013
BHC-GAMMA	MR	15	2013
Endothall	MR	15	2013
Heptachlor epoxide	MR	15	2013
Benzo(a)pyrene	MR	15	2013
ETHYLENE DIBROMIDE	MR	15	2013
Chlordane	MR	15	2013
Dalapon	MR	15	2013
Hexachlorocyclopentadiene	MR	15	2013
Toxaphene	MR	15	2013
Pentachlorophenol	MR	15	2013

Violation Count vs. the National Corpus

Guayabota has 891 recorded EPA violations, 99% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 1% carry more. 20% of this system's own violations are health-based (181 of 891), and it ranks #19,171 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)

891 Higher than most more violations than 99% 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

How many violations vs. how serious, among peer systems

Guayabota plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Guayabota. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
Guayabota: 891 violations, 20% health-based (this system)
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based

SDWIS compliance record for Guayabota

891 violations on record for PR0005186; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.

EPA SDWIS · PWS PR0005186

Sources: EPA SDWIS

Nationwide peers

891 violations · 1,028 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.

4 peers

Cross-state systems near this population served

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Guayabota

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.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.