Community Water System · PWS FL4130871
Mdwasa - Main System
Miami, Florida 33146 - drinking water served from groundwater sources to 2,377,460 people, tracked in EPA SDWIS and UCMR5.
- 2,377,460
- People served
- 26
- EPA violations
- 0
- Health-based
- 11 PFAS
- UCMR5 result
The verdict
EPA records 26 drinking-water violations at Mdwasa - Main System - below the Florida per-system average, and UCMR5 testing detected 11 PFAS compounds.
- 26
- Total EPA violations on record
- 0%
- Health-based (MCL / treatment failure)
- 2,377,460
- People served by this system
- 11
- PFAS compounds detected (UCMR5)
Water Quality Snapshot: Mdwasa - Main System
Mdwasa - Main System is a local-owned community water system that delivers drinking water to 2,377,460 residents in Miami, Florida (Miami-Dade County) through 560,000 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 26 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 15 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 Lead and Copper Rule, recorded in 5 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 11 PFAS compounds were detected in samples collected from this system, with a maximum reported concentration of 190 ppt (parts per trillion). PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.
Across Florida, EPA tracks 5,093 public water systems serving 22,381,282 people, with 184,355 cumulative violations and 24,266 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 36.2 violations. Statewide, 218 of 402 UCMR5-tested systems have reported PFAS detections (54.2%).
Mdwasa - Main System's 26 violations sit below the Florida average.
All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.
11 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 560,000
- County
- Miami-Dade
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 15
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 5 | 2020 |
| Coliform (TCR) | MR | 4 | 1992 |
| Revised Total Coliform Rule | MON | 2 | 2023 |
| TTHM | MR | 2 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 2 | 2024 |
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 51 of 232 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| HFPO-DA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 5/15/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 5/15/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFBS | 5/15/2024 | 4.60 ppt | 3.00 ppt | Detected |
| PFHpA | 5/15/2024 | 3.70 ppt | 3.00 ppt | Detected |
| PFHxS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 5/15/2024 | 11.00 ppt | 4.00 ppt | Detected |
| PFDA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 5/15/2024 | 7.20 ppt | 3.00 ppt | Detected |
| PFUnA | 5/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 5/15/2024 | 4.40 ppt | 4.00 ppt | Detected |
| PFBA | 5/15/2024 | 11.00 ppt | 5.00 ppt | Detected |
| 6:2 FTS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 5/15/2024 | 11.00 ppt | 3.00 ppt | Detected |
| PFMBA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 5/15/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| NEtFOSAA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFPeS | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NMeFOSAA | 5/15/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| 9Cl-PF3ONS | 5/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFDoA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 5/15/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFEESA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTrDA | 5/15/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| ADONA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 5/15/2024 | 12.00 ppt | 5.00 ppt | Detected |
| NMeFOSAA | 5/15/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NEtFOSAA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 5/15/2024 | 7.90 ppt | 5.00 ppt | Detected |
| 4:2 FTS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFPeA | 5/15/2024 | 10.00 ppt | 3.00 ppt | Detected |
| 11Cl-PF3OUdS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 5/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| NFDHA | 5/15/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 5/15/2024 | 4.00 ppt | 3.00 ppt | Detected |
| PFHpA | 5/15/2024 | 4.00 ppt | 3.00 ppt | Detected |
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 Mdwasa - Main System.
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 FL4130871 on SDWISSource: EPA SDWIS Federal Reports Search
Florida Drinking Water Authority
Florida Department of Environmental Protection, Drinking Water Program is the primacy agency that licenses and inspects Mdwasa - Main System under EPA-delegated authority.
Open FL regulator portalSource: Florida Department of Environmental Protection, Drinking Water Program
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 | TTHM | MR | 2 | SDWIS / FL4130871 / 2950 |
| 2024 | Total Haloacetic Acids (HAA5) | MR | 2 | SDWIS / FL4130871 / 2456 |
| 2023 | Revised Total Coliform Rule | MON | 2 | SDWIS / FL4130871 / 8000 |
| 2020 | Lead and Copper Rule | MR | 5 | SDWIS / FL4130871 / 5000 |
| 1992 | Coliform (TCR) | MR | 4 | SDWIS / FL4130871 / 3100 |
How Mdwasa - Main System Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | Mdwasa - Main System | Florida avg | Federal benchmark |
|---|---|---|---|
| Total violations | 26 | 36.2 | SDWA compliance, any non-zero count is a recorded breach |
| Health-based violations | 0 | 4.8 | Indicates a contaminant exceeded a federal MCL |
| PFAS detection | 11 compounds | 54.2% | EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt |
| Population served | 2,377,460 | 4,395 | Sizing context for compliance burden |
Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,093 regulated public water systems in Florida.
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 Mdwasa - Main System water safe to drink? ▼
How many people does Mdwasa - Main System serve? ▼
What type of violations does Mdwasa - Main System have? ▼
Has PFAS been detected in Mdwasa - Main System water? ▼
What water source does Mdwasa - Main System use? ▼
Where does this data come from? ▼
Read our methodology - how this data is sourced, computed, and verified.
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.