Miami, FL · PWSID FL4130871
Mdwasa - Main System lead service lines
289,930 lines still unidentified
Mdwasa - Main System reported no confirmed lead service lines, but 289,930 of 469,589 lines (62%) are still listed as "lead status unknown." Until a line is identified, treat it as possibly lead.
0% of Mdwasa - Main System's service lines are lead or galvanized requiring replacement. That's lower than the Florida average (0.6%) and lower than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 0%
- Unknown 62%
- Non-lead 38%
Total service lines reported: 469,589. Reported all required service line types. Population served: 2,377,460; 560,000 connections.
Lead test results
Mdwasa - Main System's most recent 90th-percentile lead result (2023) was 3.1 ppb, below both the 15 ppb action level and the 10 ppb level that takes effect in 2027. This means 90% of homes sampled were at or below that level; individual homes, especially those with lead lines, can be higher.
Lead and Copper Rule 90th-percentile results reported to EPA, in parts per billion. Dashed lines: 15 ppb action level and the 10 ppb level from November 1, 2027.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 0 in 2025 Q1 to 0 in 2026 Q3: no change. Lines of unknown material went from 289,930 to 289,930, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists 1 Lead and Copper Rule violation since 2015 for Mdwasa - Main System. Health-based violations are treatment failures, such as corrosion control or public education; the rest are missed monitoring or reporting.
| Began | Violation | Status |
|---|---|---|
| Jan 2020 | Missed follow-up or routine lead and copper tap sampling | Returned to compliance |
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
Mdwasa - Main System's main water source is groundwater (wells). It sells water to 14 other water systems: Bal Harbour Village, Town of Bay Harbor Islands, City of Hialeah, City of Homestead, Indian Creek Village, City of Miami Beach, City of North Bay Village, City of North Miami, City of Opa Locka, Town of Surfside, Town of Medley, Village of Virginia Gardens, City of West Miami, Hialeah Gardens.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line replaced
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Mdwasa - Main System whether it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in Miami-Dade County
Cities served
- Lead pipes in Miami
- Lead pipes in Doral
- Lead pipes in Coral Gables
- Lead pipes in Cutler Bay
- Lead pipes in Aventura
- Lead pipes in Miami Lakes
- Lead pipes in Palmetto Bay
- Lead pipes in Sweetwater
- Lead pipes in Pinecrest
- Lead pipes in West Park
- Lead pipes in Key Biscayne
- Lead pipes in Miami Springs
- Lead pipes in South Miami
- Lead pipes in Miami Shores
- Lead pipes in El Portal
ZIP codes served
ZIP codes whose center falls inside Mdwasa - Main System's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
330143301533032330543305533101331223312533126331273312833129331303313133133331343313533136331383314233143331443314533146331473315033155331563315733158331603316533166331723317333174331753317633179331803318233183331843318633189
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| City of Hialeah | 0 | 28,882 |
| North Miami Beach | 0 | 27,785 |
| City of Miami Beach | 151 | 0 |
| Fkaa J. Robert Dean W.T.P. | 85 | 1,372 |
| City of Opa Locka | 44 | 6,395 |
| Town of Surfside | 3 | 2 |
| Americana Village | 4 | 2 |
| Town of Medley | 4 | 2 |
Check another water system
Questions
Does Mdwasa - Main System have lead pipes?
It hasn't confirmed any, but 289,930 of its 469,589 service lines are still of unknown material, so lead has not been ruled out.
How do I check if my home's service line is lead?
Look up your address on Mdwasa - Main System's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will Mdwasa - Main System replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has Mdwasa - Main System had lead violations?
EPA's data shows 1 Lead and Copper Rule violation since 2015 for Mdwasa - Main System.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "Mdwasa - Main System lead service lines," https://leadpipemap.com/fl/mdwasa-main-system/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.