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WaterSafeCheck

ZIP Code 33146 Water Quality Report

Miami, FL · Miami-Dade County County

Safety Score
C

Water Safety Grade

Fair — Some compliance concerns

Health Violations

0

Total Violations

56

Lead Risk

Moderate

Contaminants

0

⚠

Active Water Quality Issues Detected

EPA records show 46 unresolved violations. Contact Mdwasa - Main System for current status.

About Tap Water in ZIP Code 33146

Tap water in ZIP code 33146 (Miami, FL) receives a C grade (score: 59/100) based on EPA monitoring data. While the water from Mdwasa - Main System is treated and regulated, this area has a moderate violation history that residents should be aware of.

Water System

Mdwasa - Main System

EPA ID: FL4130871

Water Source

Ground Water

Population Served

2,377,460 residents

County

Miami-Dade County County, Florida

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Lead Levels in ZIP 33146

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 3.1 ppb — Very Low

The 90th percentile lead level in 33146 is 3.1 ppb, well below the EPA action level of 15 ppb. While this is a reassuring result, the EPA's public health goal for lead is actually zero — no amount of lead is considered completely safe, particularly for children under 6 and pregnant women. Running your tap for 30 seconds before use and using a certified NSF/ANSI 53 filter adds an extra layer of protection.

Lead exposure risk in 33146 is rated Moderate. EPA models estimate a 45% probability of lead exposure risk in this ZIP code based on housing age, infrastructure age, and water system data. This may reflect a mix of older and newer housing stock and infrastructure. Families with young children should test their home's water and consider a certified NSF/ANSI 53 water filter.

Lead Level (90th percentile)
3.10 ppb (0.0031 mg/L)
Lead (Consumer Confidence Report)

From annual CCR filing

3.2 ppb
Copper (Consumer Confidence Report)

From annual CCR filing

0.1 ppb
Lead Exposure Risk Rating
Moderate
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

45%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Violation History

Past 5 years — EPA SDWIS data

Mdwasa - Main System has recorded 56 violations, but none are health-based. Administrative or reporting violations don't directly indicate unsafe water, but they do signal gaps in documentation or monitoring procedures. 46 violations are currently unresolved — meaning the issue has not yet been formally corrected in EPA records. This is a serious concern that residents should follow up on with their water utility.

Total Violations (5 yr)
56
Health-Based Violations
0
Unresolved Violations
46
Boil Water Advisories
0
Compliance Risk
High

Regulatory compliance risk is rated High. Mdwasa - Main System has a pattern of compliance issues that goes beyond isolated incidents. Residents should stay informed via their utility's Consumer Confidence Report.

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Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 33146. This means EPA monitoring has not found levels of regulated contaminants exceeding the Maximum Contaminant Levels (MCLs) set under the Safe Drinking Water Act — a positive indicator of water quality compliance.

From Consumer Confidence Report:

Total Trihalomethanes (51 ppb); Haloacetic Acids (44 ppb); Chloramines (2.7 ppm); Hazard Index PFAS (1.1 unitless); Perfluorooctane sulfonate (PFOS) (31 ppt)

⚖ Enforcement Actions

8 enforcement actions have been issued against Mdwasa - Main System — a high number that reflects sustained compliance struggles. Enforcement actions escalate from administrative orders to financial penalties when utilities repeatedly fail to meet safe drinking water standards.
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Water Source & Environmental Factors

Ground Water

This system draws water from underground aquifers. Groundwater is naturally filtered through soil and rock, but can still contain naturally occurring minerals like arsenic, radium, or nitrates.

Water Source Type
Ground Water
CCR Source Classification
Groundwater wells - primarily Biscayne Aquifer with limited Floridan Aquifer wells
EPA Radon Zone

Moderate potential

Zone 2
Annual Flood Risk Cost

Estimated annual flood-related costs per property

$3
Energy Burden

% of household income spent on energy — indicator of older infrastructure

1.15%

EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.

🛡 What Should You Do? — ZIP 33146 Recommendations

  • ⚠ Use a certified NSF/ANSI 53 filter for drinking and cooking water if you have young children
  • ⚠ Never give unfiltered tap water to infants in formula — use certified bottled or filtered water
  • ⚠ Request a copy of the Consumer Confidence Report to see what was detected and when
  • ⚠ Call the EPA Safe Drinking Water Hotline: 1-800-426-4791

Frequently Asked Questions — ZIP 33146 Water Quality

Is tap water safe to drink in ZIP code 33146?+
Tap water in 33146 (Miami, FL) is treated and regulated, but has a grade of C due to past violations. For most healthy adults, treated tap water is generally safe. Families with infants, young children, or immunocompromised individuals may want to use a certified water filter as a precaution.
What is the lead level in 33146 tap water?+
The 90th percentile lead level in 33146 is 3.1 ppb (parts per billion). The EPA action level is 15 ppb. This is a low level, well below the EPA action level of 15 ppb.
Who provides tap water to 33146?+
Tap water in ZIP code 33146 is provided by Mdwasa - Main System (EPA ID: FL4130871). This system serves approximately 2,377,460 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 33146?+
ZIP code 33146 is served by ground water. Groundwater systems draw from underground aquifers. While naturally filtered, groundwater can still contain naturally occurring contaminants such as arsenic, radium, or nitrates at elevated levels in some regions.
Does 33146 have any active water quality violations?+
Yes — there are currently 46 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact Mdwasa - Main System for the latest update.
How do I get a copy of my water quality report for 33146?+
Your water utility — Mdwasa - Main System — is required by law to send you an annual Consumer Confidence Report (CCR) by July 1 each year. You can also request it directly from the utility or find it online by searching "Mdwasa - Main System Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 33146?+
The right filter depends on what contaminants are present. For lead, look for a filter certified to NSF/ANSI Standard 53. For chlorine byproducts (like THMs), NSF/ANSI 42 filters work well. For a broad range of contaminants including PFAS, look for NSF/ANSI 58 (reverse osmosis) systems. For ZIP code 33146, with a clean compliance record, a standard carbon block filter meeting NSF/ANSI 42 is a good choice for taste and as a precaution.
Is 33146 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Current EPA data for 33146 shows a lead level of 3.1 ppb — below the action level, but as an extra precaution, run your tap for 30 seconds before use and consider a certified lead filter for infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 33146 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Mdwasa - Main System. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →