Miami Drinking Water Quality
What's Really in Your Tap Water?
Miami tap water has contaminants that exceed current EPA standards. At 383 ppm (22.4 gpg), the water is quite hard — you may notice mineral buildup on fixtures. Lead levels test well below the EPA action level. PFAS "forever chemicals" exceed EPA limits — the EPA recommends certified filtration. There have been 35 violations recorded over the past 3 years.
Action Needed
Quality issues detected
22.4 GPG hardness
Lead
Below EPA action level
EPA action level: 15 ppb
Hardness
Very Hard water
US Average: 100 ppm
Is Miami Tap Water Safe to Drink?
Miami tap water has contaminants that exceed current EPA maximum contaminant levels.
11 contaminants were tested in Miami's water. 11 were detected, and 2 exceed EPA maximum contaminant levels.
PFAS "Forever Chemicals" — PFOS at 18.98 ppt (EPA limit: 4 ppt), PFOA at 7.2 ppt (EPA limit: 4 ppt) — exceed the EPA maximum contaminant level. 9 other PFAS compounds were also detected within limits.
A man-made "forever chemical" formerly used in Scotchgard, firefighting foam, and industrial processes. According to the EPA, associated with increased cholesterol, thyroid disease, immune system suppression, and certain cancers.
→ A reverse osmosis (RO) or NSF-certified activated carbon filter can reduce PFOS by 90% or more.
Lead — Lead (3.06 ppb) is at 20% of the EPA action level of 15 ppb.
The data below shows test results from 6 water utilities serving 2.3M people in the Miami area.
Based on publicly available data from TODO: Add from CCR. Water quality can vary by location, building plumbing, and over time. This assessment reflects compliance with federal EPA standards and is not medical advice.
Do I Need a Water Filter?
Miami has PFAS levels exceeding EPA maximum contaminant levels. The EPA suggests that NSF-certified reverse osmosis or activated carbon filters can reduce PFAS levels. With very hard water (383 ppm), a water softener can reduce scale buildup in pipes, appliances, and water heaters.
How Hard is Miami Water?
383 ppm
22.4 grains per gallon
Very hard water causes significant mineral buildup. A water softener is recommended.
Impact on Your Home
Shower
Dries out skin & hair
Kitchen
Heavy mineral deposits
Laundry
Stiff, dingy clothes
Appliances
Significant scale
Regional Comparison
Values in ppm (mg/L as CaCO₃)
Do I Need a Water Softener?
At 383 ppm, Miami has very hard water. A water softener can help prevent scale buildup in water heaters, dishwashers, and pipes. According to the Water Quality Research Foundation, hard water can reduce appliance efficiency and increase energy costs. A whole-house water softener or salt-free conditioner can help.
Based on 10 samples from TODO: Add from CCR ()
Your pipes tell a different story
The data above shows what leaves the treatment plant—not what comes out of your faucet. Old pipes, lead solder, and building plumbing can add contaminants the city never tests for. Know exactly what's in your Miami tap water.
Home test kits detect lead, bacteria, pesticides, and 100+ other contaminants. Results in 5-10 business days from certified labs.
Lead & Contaminants
Understanding lead levels and water quality violations in Miami
Lead Test Results
90th Percentile Lead Level
3.06 ppb
Miami lead levels are well below the EPA action level.
Regular testing is still recommended, as lead can enter water through household plumbing.
Last sampled: 2025-06-01
About Lead in Drinking Water
What is Lead in Water?
According to the EPA, lead is a toxic metal that can dissolve into drinking water from older pipes, solder, and fixtures. It's invisible, tasteless, and odorless, making testing the only way to detect it. The EPA has set an action level of 15 ppb and states there is no safe level of lead exposure.
Potential Health Effects
According to the CDC: developmental delays, learning difficulties, lower IQ, behavioral issues
According to the EPA: high blood pressure, kidney damage, reproductive issues
How to Reduce Exposure
- •Run water for 30 seconds to 2 minutes before drinking, especially in the morning
- •Use cold water for cooking and drinking (hot water dissolves more lead)
- •Install a NSF-certified filter designed to remove lead
- •Test your water, especially if your home was built before 1986
PFAS “Forever Chemicals”
2 PFAS chemicals exceed EPA maximum contaminant levels
+ 7 more PFAS compounds detected
PFAS are synthetic chemicals that don't break down in the environment. The EPA suggests that certified reverse osmosis or activated carbon filters can reduce PFAS levels.
Other Detected Contaminants
11 contaminants detected
| Contaminant | Your Water | Limit (MCL) | Status |
|---|---|---|---|
6:2 FTS | 108.93 ppt Range: 0-190 UCMR5 - 3/8 samples detected | N/A | Safe |
8:2 FTS | 8.9 ppt Range: 0-9.6 UCMR5 - 2/8 samples detected | N/A | Safe |
PFBA | 13.63 ppt Range: 0-22 UCMR5 - 6/8 samples detected | N/A | Safe |
PFBS | 4.12 ppt Range: 0-4.6 UCMR5 - 6/8 samples detected | N/A | Safe |
PFHPA | 10.14 ppt Range: 0-20 UCMR5 - 5/8 samples detected | N/A | Safe |
PFHXA | 23.15 ppt Range: 0-58 UCMR5 - 6/8 samples detected | N/A | Safe |
PFHxS | 6.87 ppt Range: 0-9.4 UCMR5 - 3/8 samples detected | 10 ppt Goal: 10 ppt | Caution 69% of limit |
PFNA | 5.6 ppt Range: 0-6.5 UCMR5 - 2/8 samples detected | 10 ppt Goal: 10 ppt | Caution 56% of limit |
PFOA | 7.2 ppt Range: 0-14 UCMR5 - 6/8 samples detected - Max 14.0 ppt exceeds EPA MCL of 4 ppt | 4 ppt 0 | Exceeds 180% of limit |
PFOS | 18.98 ppt Range: 0-33 UCMR5 - 6/8 samples detected - Max 33.0 ppt exceeds EPA MCL of 4 ppt | 4 ppt 0 | Exceeds 475% of limit |
PFPEA | 23.35 ppt Range: 0-56 UCMR5 - 6/8 samples detected | N/A | Safe |
MCL = Maximum Contaminant Level (EPA legal limit)
EPA Compliance History
Active Violations
Administrative issues pendingCurrent violations are administrative or monitoring-related. Water quality is not immediately affected, but stay informed about utility updates.
3-Year Violation Summary
35
Total Violations
0
Health-Related
35
Administrative
Health-Related Violations
Contaminant exceeded EPA maximum contaminant levels. The EPA recommends considering certified filtration.
Administrative Violations
Missed testing deadlines or reporting. Does not indicate water quality issues.
Who Provides Miami's Water?
Utility Name
MDWASA - MAIN SYSTEM
EPA System ID (PWSID)
FL4130871
Primary Water Source
Groundwater
Population Served
2.3M
Frequently Asked Questions
Common questions about Miami tap water quality
Nearby Cities in Florida
Orlando
Very Hard water
Tampa
Very Hard water
Jacksonville
Soft water
West Palm Beach
Very Hard water
Clearwater
Very Hard water
Lithia
This data is for informational purposes only. Water quality can vary by neighborhood and building. For official reports, contact your local water utility or the EPA. Learn about our methodology
Data source: TODO: Add from CCR ()