Miami-Dade County, Florida
EPA treatment records (state-reported) list chloramines for City of Hialeah. EPA record
Miami-Dade Water & Sewer Department's 2025 water quality report says it uses chloramine. 2025 water quality report
Hialeah has 10 scored ZIP codes served mainly by 2 water utilities, 1 of which buys water from another system. Water Scores range from 50 to 55, with a median of 55. The contaminant most often above a published health guideline is Arsenic, in 2 of 2 utilities (EPA SDWA, EPA UCMR and Florida DEP data, 2020). Scored against health guidelines that are stricter than legal limits, using public utility data. Not a test of your tap.
| ZIP code | Main utility | Water Score | Above guideline |
|---|---|---|---|
| 33002 | City of Hialeah | 55 Weak | 5 of 35 |
| 33010 | City of Hialeah | 55 Weak | 5 of 35 |
| 33011 | City of Hialeah | 55 Weak | 5 of 35 |
| 33012 | City of Hialeah | 55 Weak | 5 of 35 |
| 33013 | City of Hialeah | 55 Weak | 5 of 35 |
| 33014 | Miami-Dade Water & Sewer Department | 50 Weak | 5 of 36 |
| 33015 | Miami-Dade Water & Sewer Department | 50 Weak | 5 of 36 |
| 33016 | City of Hialeah | 55 Weak | 5 of 35 |
| 33017 | City of Hialeah | 55 Weak | 5 of 35 |
| 33018 | City of Hialeah | 55 Weak | 5 of 35 |
| Utility | ZIP codes | People served | Water Score | Above guideline | Buys water from |
|---|---|---|---|---|---|
| City of Hialeah | 8 | 238,000 | 55 Weak | 5 of 35 | Miami-Dade Water & Sewer Department |
| Miami-Dade Water & Sewer Department | 2 | 2,377,460 | 50 Weak | 5 of 36 | No purchases recorded |
Purchased water: City of Hialeah buys from Miami-Dade Water & Sewer Department.
Counted once per utility. Source: EPA SDWA, EPA UCMR and Florida DEP data, 2018-2025.
| Contaminant | Utilities above guideline | ZIP codes | Highest level | Years |
|---|---|---|---|---|
| Arsenic | 2 of 2 | 10 | 425 times its guideline | 2020 |
| Bromodichloromethane | 2 of 2 | 10 | 143 times its guideline | 2020-2022 |
| Dibromochloromethane | 2 of 2 | 10 | 48 times its guideline | 2020-2022 |
| Chloroform | 2 of 2 | 10 | 45 times its guideline | 2020-2022 |
| Bromoform | 2 of 2 | 10 | 1.1 times its guideline | 2020-2022 |
124,488 housing units across 7 ZIP codes with data: 50.2% single-family homes, 41.5% in buildings of five or more units, 50.5% owner-occupied. Source: Census ACS 5-year estimates, ACS 2024 5-year.
A legal limit is an enforceable standard, set by the EPA under the Safe Drinking Water Act. Limits weigh health research together with the cost and feasibility of treatment. A health guideline is published by public-health sources and based on health research alone. A utility can meet every legal limit and still be above a published health guideline.
Approximate service area from EPA's Community Water System Service Area Boundaries; some boundaries are modeled estimates. Your water bill names your utility.
Solid: EPA has this type of record for the system. Grey: it does not.
2 utilities are the main supplier for at least one scored ZIP code in Hialeah. The largest by ZIP codes served: City of Hialeah (8 ZIP codes) and Miami-Dade Water & Sewer Department (2 ZIP codes). Source: EPA Water System Boundaries (CWS service area boundaries) v3.0, March 2026 release.
The lowest Water Scores are 33014 (50), 33015 (50) and 33002 (55). The highest are 33018 (55), 33017 (55) and 33016 (55). A score describes the utility's public test results for that ZIP code, not the water at any one tap (EPA SDWA, EPA UCMR and Florida DEP data, 2018-2025).
Arsenic (above its guideline in 2 of 2 utilities, up to 425 times), Bromodichloromethane (above its guideline in 2 of 2 utilities, up to 143 times) and Dibromochloromethane (above its guideline in 2 of 2 utilities, up to 48 times). Source: EPA SDWA, EPA UCMR and Florida DEP data, 2018-2025.
Yes. City of Hialeah buys from Miami-Dade Water & Sewer Department. Source: EPA SDWA records, July to September 2026 extract.
The score starts at 100. It goes down 8 for each contaminant above a cited health guideline whose source states a cancer basis, 5 for each other contaminant above its cited guideline, 5 for each of PFOA and PFOS averaging above the 4.0 ppt limit in EPA's 2024 PFAS rule, 10 for each contaminant whose average of all samples is above EPA's legal limit (instead of its guideline step), and 1 for each contaminant with a cited cancer-based guideline that is detected below it. Only guidelines with a cited document count. The lowest score is 5. Higher is better.
A legal limit is an enforceable standard, set by the EPA under the Safe Drinking Water Act. Limits weigh health research together with the cost and feasibility of treatment. A health guideline is published by public-health sources and based on health research alone. A utility can meet every legal limit and still be above a published health guideline.
Highest and lowest Water Scores in Hialeah, Florida
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