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Community Water System · PWS PR0005286

Cubuy Maizales

Canovanas, Puerto Rico 00729 - drinking water served from surface water sources to 617 people, tracked in EPA SDWIS and UCMR5.

617
People served
590
EPA violations
398
Health-based
Untested
UCMR5 result

The verdict

EPA records 590 drinking-water violations at Cubuy Maizales, 67% of them health-based - above the Puerto Rico per-system average.

590
Total EPA violations on record
67%
Health-based (MCL / treatment failure)
617
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cubuy Maizales

Cubuy Maizales is a local-owned community water system that delivers drinking water to 617 residents in Canovanas, Puerto Rico (Naguabo Municipio County) through 231 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 590 total violations for this system , of which 398 (67%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 151 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 315 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Puerto Rico, EPA tracks 458 public water systems serving 3,328,141 people, with 164,144 cumulative violations and 34,657 health-based violations on record. About 100% of systems in the state carry at least one violation, and state-wide the average per system is 358.4 violations. Statewide, 40 of 99 UCMR5-tested systems have reported PFAS detections (40.4%).

Cubuy Maizales's 590 violations sit above the Puerto Rico average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
617
Total Violations
590
Health-Based Violations
398
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
231
County
Naguabo Municipio
School/Daycare
No
MCL Violations
324
Monitoring Violations
151
Treatment Tech Violations
74

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 315 2010
Long Term 2 Enhanced Surface Water Treatment Rule TT 59 2019
Lead and Copper Rule MR 43 2016
TTHM MR 10 2015
Public Notice Other 9 2019
Total Haloacetic Acids (HAA5) MCL 9 2020
Long Term 2 Enhanced Surface Water Treatment Rule MR 9 2024
Cryptosporidium MR 8 2010
Coliform (TCR) MR 8 2014
CARBON, TOTAL TT 7 2011
Consumer Confidence Rule Other 6 2022
Total Haloacetic Acids (HAA5) MR 6 2015
Surface Water Treatment Rule TT 5 2008
Interim Enhanced Surface Water Treatment Rule TT 3 2016
Gross Alpha, Excl. Radon and U MR 3 2010
Combined Radium (-226 and -228) MR 3 2010
Di(2-ethylhexyl) adipate MR 2 2009
Simazine MR 2 2009
Atrazine MR 2 2009
Benzo(a)pyrene MR 2 2009
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2009
OXAMYL MR 2 2009
Carbofuran MR 2 2009
Endothall MR 2 2009
Hexachlorocyclopentadiene MR 2 2009
LASSO MR 2 2009
Radium-226 MR 2 2010
Barium MR 2 1984
Cadmium MR 2 1984
Nitrate MR 2 1984

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Cubuy Maizales.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID PR0005286 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Puerto Rico Drinking Water Authority

Puerto Rico's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find PR regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Long Term 2 Enhanced Surface Water Treatment Rule MR 9 SDWIS / PR0005286 / 0800
2022 Consumer Confidence Rule Other 6 SDWIS / PR0005286 / 7000
2020 Total Haloacetic Acids (HAA5) MCL 9 SDWIS / PR0005286 / 2456
2020 Surface Water Treatment Rule MR 1 SDWIS / PR0005286 / 0200
2019 Long Term 2 Enhanced Surface Water Treatment Rule TT 59 SDWIS / PR0005286 / 0800
2019 Public Notice Other 9 SDWIS / PR0005286 / 7500
2016 Lead and Copper Rule MR 43 SDWIS / PR0005286 / 5000
2016 Interim Enhanced Surface Water Treatment Rule TT 3 SDWIS / PR0005286 / 0300
2015 TTHM MR 10 SDWIS / PR0005286 / 2950
2015 Total Haloacetic Acids (HAA5) MR 6 SDWIS / PR0005286 / 2456
2014 Coliform (TCR) MR 8 SDWIS / PR0005286 / 3100
2011 CARBON, TOTAL TT 7 SDWIS / PR0005286 / 2920
2010 Coliform (TCR) MCL 315 SDWIS / PR0005286 / 3100
2010 Cryptosporidium MR 8 SDWIS / PR0005286 / 3015
2010 Gross Alpha, Excl. Radon and U MR 3 SDWIS / PR0005286 / 4000

How Cubuy Maizales Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Cubuy Maizales Puerto Rico avg Federal benchmark
Total violations 590 358.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 398 75.7 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 617 7,267 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 458 regulated public water systems in Puerto Rico.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Cubuy Maizales water safe to drink? ▼
Cubuy Maizales (PWS ID: PR0005286) has 590 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 617 people using Surface Water sources.
How many people does Cubuy Maizales serve? ▼
Cubuy Maizales serves 617 people in Canovanas, Puerto Rico. It is a Local-owned system using Surface Water water sources with 231 service connections.
What type of violations does Cubuy Maizales have? ▼
Cubuy Maizales has 590 total violations: 398 health-based violations (MCL exceedances or treatment failures), 151 monitoring/reporting violations, and 74 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cubuy Maizales water? ▼
No PFAS testing data is available for Cubuy Maizales under the EPA's UCMR5 monitoring program.
What water source does Cubuy Maizales use? ▼
Cubuy Maizales 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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

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

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