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Miami-Dade County, Florida — public water systems

At a glance

172 active public water systems are filed under Miami-Dade County, Florida in EPA's SDWIS records, together reporting 3,326,006 people served. The largest is Mdwasa - Main System, which reports serving 2,377,460 people. 25 are community water systems serving people where they live; the other 147 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.

Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.

Active systems

172

Population served

3.3M

Community systems

25

Groundwater share

98.8%

How does Miami-Dade County compare with other Florida counties?

Miami-Dade County has the 6th-most active public water systems among the 138 counties listed for active Florida systems in EPA records; among the 71 with 3 or more systems, the median has 41. Its systems report 3,326,006 people served in total, the largest county figure in the state and 15% of the statewide total. The average system here reports serving 19,337 people, about 4.5 times the Florida average of 4,345. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.

Where does Miami-Dade County's drinking water come from?

By primary water source, Miami-Dade County's active systems draw on groundwater (158, 92%), purchased groundwater (12, 7%), surface water (1, 0.6%) and purchased surface water (1, 0.6%). Overall, 99% rely mainly on groundwater (including purchased groundwater) and 1.2% on surface water, compared with 98% and 2.1% across Florida. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Mdwasa - Main System, draws primarily on groundwater.

What kinds of water systems operate in Miami-Dade County?

Miami-Dade County's active systems break down as 25 community systems (15%), 16 non-transient non-community systems (9.3%) and 131 transient non-community systems (76%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (76%), local government (17%), federal government (6.4%) and state government (1.2%).

The 50 largest water systems in Miami-Dade County

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Active public water systems in Miami-Dade County, Florida
#Water systemCountyPopulation servedTypeSource
1Mdwasa - Main SystemMiami-Dade2,377,460CommunityGroundwater
2Hialeah, City ofMiami-Dade238,000CommunityGroundwater
3North Miami BeachMiami-Dade180,000CommunityGroundwater
4Miami Beach, City ofMiami-Dade100,000CommunityPurchased groundwater
5North Miami, City ofMiami-Dade89,349CommunityGroundwater
6Fkaa J. Robert Dean W.T.P.Miami-Dade86,000CommunityGroundwater
7Homestead, City ofMiami-Dade80,000CommunityGroundwater
8Mdwasa/Rex UtilitiesMiami-Dade45,200CommunityGroundwater
9Miami Intl AirportMiami-Dade25,000Non-transient non-communityPurchased groundwater
10Hialeah GardensMiami-Dade22,200CommunityPurchased groundwater
11Opa Locka, City ofMiami-Dade16,479CommunityGroundwater
12Florida CityMiami-Dade13,453CommunityGroundwater
13West Miami, City ofMiami-Dade8,500CommunityPurchased groundwater
14North Bay Village, City ofMiami-Dade8,317CommunityPurchased groundwater
15Bay Harbor Islands Town ofMiami-Dade6,000CommunityPurchased groundwater
16Surfside, Town ofMiami-Dade5,744CommunityPurchased groundwater
17Bal Harbour VillageMiami-Dade3,209CommunityPurchased groundwater
18Americana VillageMiami-Dade2,500CommunityGroundwater
19Virginia Gardens, Village ofMiami-Dade2,472CommunityPurchased groundwater
20Redland Middle SchoolMiami-Dade1,481Non-transient non-communityGroundwater
21Homestead Air Force BaseMiami-Dade1,200Non-transient non-communityGroundwater
22Town of MedleyMiami-Dade958CommunityPurchased groundwater
23Costa FarmsMiami-Dade598Non-transient non-communityGroundwater
24Miami Everglades CampgroundMiami-Dade560Transient non-communityGroundwater
25Redland Community ChurchMiami-Dade450Transient non-communityGroundwater
26Rex Utilities Inc./RedavoMiami-Dade350CommunityPurchased groundwater
271st Baptist Church of HomesteadMiami-Dade300Transient non-communityGroundwater
28Everglades Pk-Long Pine KeyMiami-Dade300Transient non-communityGroundwater
29Redland Christian AcademyMiami-Dade300Non-transient non-communityGroundwater
30Silver Palm Mobile HomesMiami-Dade250CommunityGroundwater
31Everglades Alligator FarmMiami-Dade250Transient non-communityGroundwater
32Costa Farm RioMiami-Dade220Transient non-communityGroundwater
33Monkey JungleMiami-Dade200Transient non-communityGroundwater
34Robert Is HereMiami-Dade200Transient non-communityGroundwater
35Redlands GroceryMiami-Dade200Transient non-communityGroundwater
36Curaleaf Florida, LLCMiami-Dade200Transient non-communityGroundwater
37Silver Palms Methodist ChurchMiami-Dade200Transient non-communityGroundwater
38Costa Nursery (Shipping)Miami-Dade200Transient non-communityGroundwater
39Brooks TropicalsMiami-Dade200Transient non-communityGroundwater
40Redland Mhc, LLCMiami-Dade160CommunityGroundwater
41Cemex-F.E.C., OfficeMiami-Dade160Transient non-communityGroundwater
42Costa Color PackingMiami-Dade150Transient non-communityGroundwater
43Costa Color ParkingMiami-Dade150Transient non-communityGroundwater
44Cemex EmployeesMiami-Dade150Transient non-communityGroundwater
45Krome Avenue ChurchMiami-Dade150Transient non-communityGroundwater
46Camp Owaissa BauerMiami-Dade150Transient non-communityGroundwater
47Safari RestaurantMiami-Dade150Transient non-communityGroundwater
48Life Pointe ChurchMiami-Dade150Non-transient non-communityGroundwater
49Tropical Research ; Education CenterMiami-Dade130Non-transient non-communityGroundwater
50Christ FellowshipMiami-Dade120Transient non-communityGroundwater

All other water systems in Miami-Dade County (122)

The remaining active systems filed under Miami-Dade County, largest first, with the population each reports serving.

Miami-Dade County water systems: frequently asked questions

How many public water systems are in Miami-Dade County, Florida?

EPA's SDWIS records file 172 active public water systems under Miami-Dade County, Florida: 25 community systems (15%), 16 non-transient non-community systems (9.3%) and 131 transient non-community systems (76%).

Who supplies drinking water in Miami-Dade County, FL?

The largest community water systems filed under Miami-Dade County are Mdwasa - Main System (2,377,460 people served), City of Hialeah (238,000 people served) and North Miami Beach (180,000 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.

Does Miami-Dade County's drinking water come from groundwater or surface water?

Of the 172 active public water systems in Miami-Dade County, 99% draw mainly on groundwater and 1.2% on surface water, counting purchased supplies. The largest system, Mdwasa - Main System, uses groundwater.

Where can I find a water quality report for Miami-Dade County?

Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 25 community systems are filed under Miami-Dade County, so the report to look for is the one from the system that supplies your address.

How can I check violations for a water system in Miami-Dade County?

Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.

More Florida water systems

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Public water systems in Miami-Dade County, Florida”, https://aquacensus.com/water-systems/florida/miami-dade (data as of October 1, 2026).