Is Hialeah tap water safe?

We don't give a safe or unsafe verdict. Here is what the public records show for City of Hialeah: 5 of 35 detected contaminants were above the health guidelines we use (2018-2025), no health-based violations were recorded since July 1, 2021 (EPA SDWIS), and the Water Score is 55/100. These records can be one to three years old and may not reflect the water at your tap. Its PFOA or PFOS results averaged above 4.0 ppt, the level EPA set in 2024 (not yet enforceable). Details are in the full report. Our systems aren't certified for PFAS. That isn't a clean bill of health or a health finding. EPA's national files don't hold sample results for most regulated contaminants. For health questions, ask your utility or your doctor.

33010 Hialeah water quality

Data updated October 24, 2026

Water Score · Weak

Hialeah

ZIP 33010

Based on EPA SDWA, EPA UCMR and Florida DEP data, 2018-2025. Based on public utility data, not a test of your tap. Not medical advice.

Drinking glasses with cloudy spots — **Spots on glasses**

A faucet crusted with white buildup — **Crusty faucets**

Shower glass with a cloudy film — **Film on the shower**

A glass of tap water at a kitchen sink — **Tastes like a pool**

These show common South Florida water issues.

Arsenic425× the health guideline

Bromodichloromethane60× the health guideline

Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)

+3 more in the full report

Bars use a log scale. Source: EPA SDWA, EPA UCMR and Florida DEP data

About ZIP 33010

Ranked #174 of 286 Florida ZIP codes by Water Score, as of October 24, 2026. Ranked #16 of 128 Miami-Dade County ZIP codes by Water Score, as of October 24, 2026.

Housing units: 16,044 (Census ACS 2024 5-year)
Owner / renter: 30% / 70%
Single-family homes: 42%
Buildings with 5+ units: 42%
Median home value: $346,500 (Census ACS 2023 5-year)
Median household income: $45,449 (Census ACS 2023 5-year)
Households: 15,845 (Census ACS 2023 5-year)
Owner-occupied share: 30% (Census ACS 2023 5-year)

ZCTA, approximates ZIP

Who supplies the water

ZIP 33010 is served by one utility: City of Hialeah (100%).

A neighboring ZIP code, 33011 (Hialeah), is served mainly by the same utility, City of Hialeah. Its Water Score is also 55/100.

Your utility at a glance

Utility: City of Hialeah
EPA water system ID (PWSID): FL4130604
People served: 238,000
Water source: Ground water
Buys water from: Miami-Dade Water & Sewer Department
Water quality report (CCR): Utility's 2026 water quality report (2025 data)
Health-based violations: None recorded (EPA SDWIS, July to September 2026, since July 1, 2021)

How this ZIP compares

See the full report

ZIP 33010High-confidence match

Water report for City of Hialeah, ZIP 33010

Hialeah, Miami-Dade County

Data updated October 24, 2026

According to EPA water system boundaries, ZIP 33010 (Hialeah, Miami-Dade County) is served mainly by City of Hialeah, which buys water from Miami-Dade Water & Sewer Department. In EPA SDWA, EPA UCMR and Florida DEP data from 2018-2025, 5 of 35 detected contaminants are above published health guidelines; PFOS averaged above 4.0 ppt, the limit in EPA's 2024 PFAS rule (water systems must meet it by April 2029; EPA has proposed allowing until 2031). The Water Score is 55 out of 100, in the Weak band. Scored against health guidelines that are stricter than legal limits, using public utility data. Not a test of your tap.

Miami-Dade Water & Sewer Department → City of Hialeah → your tap

Water Score

Higher is better. The score starts at 100 and goes down for each contaminant above its health guideline.

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Every result, with its health guideline and legal limit

Each bar is the level reported for ZIP 33010. It is drawn against its own health guideline, so rows are not comparable with each other. The ink line is the health guideline, with its publisher named on each row, and the dashed line is EPA's legal limit or, for PFAS, the level in EPA's 2024 rule. Log scale: each step right is ten times more.

Arsenic^*1.7 ppb
Health guideline 0.004 ppb (California OEHHA 2004)Legal limit 10 ppb425× the health guideline
average of all samples
highest sample 2.1 ppb
detected in 3 of 3 samples
Bromodichloromethane3.62 ppb
Health guideline 0.06 ppb (California OEHHA 2020)Legal limit Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)60× the health guideline
average of all samples
highest sample 35.6 ppb
detected in 58 of 73 samples
Chloroform17.6 ppb
Health guideline 0.4 ppb (California OEHHA 2020)Legal limit Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)44× the health guideline
average of all samples
highest sample 153 ppb
detected in 61 of 73 samples

* Measured by Miami-Dade Water & Sewer Department, which supplies this utility's water.

Under EPA's 2024 PFAS rule, water systems must meet the PFOA and PFOS limits (4.0 ppt each) by April 2029; in May 2026 EPA proposed allowing extensions to April 2031. Results before then are monitoring data, not violations.

What was found

Above published health guidelines (5)

Guideline basis: long-term cancer risk

Arsenic^*

Far above guideline

425×the health guideline

This utility: 1.7 ppbaverage of all sampleshighest sample 2.1 ppbdetected in 3 of 3 samples
Legal limit: 10 ppb
Health guideline: 0.004 ppb

Arsenic: a natural element that enters water from rock and soil deposits and from some orchard and industrial runoff. California OEHHA set a 0.004 ppb public health goal in 2004 to limit lung and bladder cancer risk; EPA's enforceable limit is 10 ppb (in effect since 2006). Source: California OEHHA

Guideline basis: long-term cancer risk

Bromodichloromethane

Far above guideline

60×the health guideline

This utility: 3.62 ppbaverage of all sampleshighest sample 35.6 ppbdetected in 58 of 73 samples
Legal limit: Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)
Health guideline: 0.06 ppb

Bromodichloromethane: a disinfection by-product that forms when chlorine reacts with organic matter. California OEHHA set a 0.06 ppb public health goal to limit long-term cancer risk. Source: California OEHHA

Guideline basis: long-term cancer risk

Chloroform

Far above guideline

44×the health guideline

This utility: 17.6 ppbaverage of all sampleshighest sample 153 ppbdetected in 61 of 73 samples
Legal limit: Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)
Health guideline: 0.4 ppb

Chloroform: a disinfection by-product that forms when chlorine reacts with organic matter. California OEHHA set a 0.4 ppb public health goal in 2020 to limit long-term cancer risk; it also counts toward EPA's 80 ppb limit for total trihalomethanes. Source: California OEHHA

Guideline basis: long-term cancer risk

Dibromochloromethane

Far above guideline

11×the health guideline

This utility: 1.11 ppbaverage of all sampleshighest sample 19.4 ppbdetected in 20 of 73 samples
Legal limit: Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)
Health guideline: 0.1 ppb

Dibromochloromethane: a disinfection by-product that forms when chlorine reacts with organic matter. California OEHHA set a 0.1 ppb public health goal in 2020 to limit long-term cancer risk; it also counts toward EPA's 80 ppb limit for total trihalomethanes. Source: California OEHHA

Guideline basis: long-term cancer risk

Bromoform^*

Above guideline

1.1×the health guideline

This utility: 0.56 ppbaverage of all sampleshighest sample 1.9 ppbdetected in 40 of 88 samples
Legal limit: Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)
Health guideline: 0.5 ppb

Bromoform: a disinfection by-product that forms when chlorine reacts with organic matter. California OEHHA set a 0.5 ppb public health goal in 2020 to limit long-term cancer risk; it also counts toward EPA's 80 ppb limit for total trihalomethanes. Source: California OEHHA

Average above 4.0 ppt, the limit in EPA's 2024 PFAS rule (water systems must meet it by April 2029; EPA has proposed allowing until 2031)

Our systems aren't certified for PFAS.

Average above 4.0 ppt, the limit in EPA's 2024 PFAS rule (water systems must meet it by April 2029; EPA has proposed allowing until 2031)
Contaminant	This utility	Legal limit or action level	Health guideline	Years
PFOSEPA's 2024 rule sets a limit of 4.0 ppt; water systems must meet it by April 2029. In May 2026 EPA proposed allowing extensions to April 2031. EPA's goal (MCLG) is zero.	13 pptaverage of all sampleshighest sample 27.6 pptdetected in 4 of 6 samples	4 ppt	None published	2023-2024

The level shown is the average of all of the utility's results in the years shown, with results below EPA's reporting level counted as zero. The highest single result and the number of samples in which it was detected are shown with each level. Each of these averaged above 4.0 ppt across all of the utility's samples, with results below the reporting level counted as zero. EPA judges compliance on a running annual average at each sampling point, so our combined average is a guide, not a compliance result. Under EPA's 2024 PFAS rule, water systems must meet the PFOA and PFOS limits (4.0 ppt each) by April 2029; in May 2026 EPA proposed allowing extensions to April 2031. Results before then are monitoring data, not violations.

Public data from EPA UCMR 5, 2023–2024. It isn't a test of your tap, and your water can differ. Last checked against the Federal Register: October 25, 2026.

Lead

Lead: 0.9 ppb (90th percentile of tap samples, January to December 2025). EPA action level (90th percentile): 15 ppb.

Lead is measured at the tap in homes selected because they are most likely to have lead plumbing. EPA says lead in drinking water mainly comes from pipes, solder and fixtures in service lines and buildings, not from the water source. Your home's plumbing matters more than the utility's number. EPA's goal (MCLG) for lead is zero.

California's public health goal for lead is 0.2 ppb.

If your home is older or may have a lead service line, ask your utility (it must keep a service-line inventory) or have your tap tested by a state-certified lab.

Other contaminants detected (28)

Other contaminants detected, within their health guidelines or without one
Contaminant	This utility	Legal limit or action level	Health guideline	Years
Fluoride	434 ppbaverage of all sampleshighest sample 630 ppbdetected in 12 of 14 samples	4,000 ppb	None published	2018-2021
Nitrate	50.3 ppbaverage of all sampleshighest sample 140 ppbdetected in 3 of 7 samples	10,000 ppb	None published	2018-2021
Haloacetic acids (HAA9)	37.4 ppbaverage of all sampleshighest sample 61.4 ppbdetected in 17 of 18 samples	No federal limit	None published	2018-2019
Nitrite	33.3 ppbaverage of all sampleshighest sample 180 ppbdetected in 2 of 7 samples	1,000 ppb	None published	2018-2021
Haloacetic acids (HAA5)	30.3 ppbaverage of all sampleshighest sample 120 ppb

* Measured by Miami-Dade Water & Sewer Department, which supplies this utility's water.

Questions people ask

Utilities serving ZIP 33010
Utility	Share of the ZIP area	Role
City of Hialeah	100%	Main utility (this report)

Which water utility serves ZIP 33010?

City of Hialeah (EPA water system FL4130604) is the main utility for ZIP 33010, based on EPA Water System Boundaries (CWS service area boundaries) v3.0, March 2026 release overlaid on Census ZIP code areas. Your water bill names your utility.

Does the utility serving ZIP 33010 buy water from another system?

Yes. City of Hialeah buys water from Miami-Dade Water & Sewer Department, according to EPA SDWA records (July to September 2026 extract). Results measured by the supplier are marked with an asterisk on the report.

How many contaminants in ZIP 33010 are above published health guidelines?

5 of 35 detected contaminants were above their published health guidelines in EPA SDWA, EPA UCMR and Florida DEP data, 2018-2025. The highest: Arsenic at 425 times its guideline, Bromodichloromethane at 60 times its guideline and Chloroform at 44 times its guideline. PFOS averaged above 4.0 ppt, the limit in EPA's 2024 PFAS rule (water systems must meet it by April 2029; EPA has proposed allowing until 2031).

How is the Water Score for ZIP 33010 calculated?

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. For this report: 100 minus 8 times 5, minus 5 times 1 (PFOS average above 4.0 ppt, the limit in EPA's 2024 PFAS rule) is 55, so the score is 55.

What is the difference between a health guideline and a legal limit?

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.

How recent is the data for ZIP 33010?

Test results cover 2018-2025. EPA compliance records come from the July to September 2026 extract. Data may be one to three years old and may not reflect water at your tap.

Results for ZIP 33010: level reported, health guideline, and legal limit or action level
Contaminant	Level reported	Health guideline (publisher)	Legal limit or action level	Multiple of guideline
Arsenic	1.7 ppb. average of all samples highest sample 2.1 ppb detected in 3 of 3 samples	0.004 ppb (California OEHHA 2004)	10 ppb	425× the health guideline
Bromodichloromethane	3.62 ppb. average of all samples highest sample 35.6 ppb detected in 58 of 73 samples	0.06 ppb (California OEHHA 2020)	Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)	60× the health guideline
Chloroform	17.6 ppb. average of all samples highest sample 153 ppb detected in 61 of 73 samples	0.4 ppb (California OEHHA 2020)	Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)	44× the health guideline
Dibromochloromethane	1.11 ppb. average of all samples highest sample 19.4 ppb detected in 20 of 73 samples	0.1 ppb (California OEHHA 2020)	Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)	11× the health guideline
Bromoform	0.56 ppb. average of all samples highest sample 1.9 ppb detected in 40 of 88 samples	0.5 ppb (California OEHHA 2020)	Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)	1.1× the health guideline
PFOS	13 ppt. average of all samples highest sample 27.6 ppt detected in 4 of 6 samples	zero (EPA MCLG)	4 ppt (from 2029)	Not above its guideline, or no guideline
PFOA	3 ppt. average of all samples highest sample 10.2 ppt detected in 2 of 6 samples	zero (EPA MCLG)	4 ppt (from 2029)	Not above its guideline, or no guideline
Haloacetic acids (HAA5)	30.3 ppb. average of all samples highest sample 120 ppb detected in 121 of 136 samples	None published	60 ppb	Not above its guideline, or no guideline
Total trihalomethanes (TTHMs)	17.6 ppb. average of all samples highest sample 197 ppb detected in 107 of 135 samples	None published	80 ppb	Not above its guideline, or no guideline
PFHxS	2.02 ppt. average of all samples highest sample 6.5 ppt detected in 2 of 6 samples	10 ppt (EPA MCLG)	10 ppt (from 2029)	Not above its guideline, or no guideline
Fluoride	434 ppb. average of all samples highest sample 630 ppb detected in 12 of 14 samples	None published	4,000 ppb	Not above its guideline, or no guideline
PFNA	0.72 ppt. average of all samples highest sample 4.3 ppt detected in 1 of 6 samples	10 ppt (EPA MCLG)	10 ppt (from 2029)	Not above its guideline, or no guideline
Nitrite	33.3 ppb. average of all samples highest sample 180 ppb detected in 2 of 7 samples	None published	1,000 ppb	Not above its guideline, or no guideline
Uranium	0.49 ppb. average of all samples highest sample 1.47 ppb detected in 1 of 3 samples	None published	30 ppb	Not above its guideline, or no guideline
Selenium	0.6 ppb. average of all samples highest sample 1 ppb detected in 2 of 3 samples	None published	50 ppb	Not above its guideline, or no guideline
Nitrate	50.3 ppb. average of all samples highest sample 140 ppb detected in 3 of 7 samples	None published	10,000 ppb	Not above its guideline, or no guideline
PFBS	2.72 ppt. average of all samples highest sample 5.1 ppt detected in 4 of 6 samples	2,000 ppt (U.S. EPA 2022)	No federal limit	Not above its guideline, or no guideline
Barium	0.23 ppb. average of all samples highest sample 1.4 ppb detected in 1 of 6 samples	None published	2,000 ppb	Not above its guideline, or no guideline
6:2 FTSA	25.6 ppt. average of all samples highest sample 91.1 ppt detected in 2 of 6 samples	None published	No federal limit	Not above its guideline, or no guideline
8:2 FTSA	0.92 ppt. average of all samples highest sample 5.5 ppt detected in 1 of 6 samples	None published	No federal limit	Not above its guideline, or no guideline
Aluminum	3.93 ppb. average of all samples highest sample 5 ppb detected in 3 of 3 samples	None published	No federal limit	Not above its guideline, or no guideline
Copper	0.18 ppb. average of all samples highest sample 1.1 ppb detected in 1 of 6 samples Measured where water enters the distribution system, not at the tap. EPA's action level applies to tap samples.	None published	1,300 ppb (EPA action level, 90th percentile)	Not above its guideline, or no guideline
Dibromoacetic acid	1.85 ppb. average of all samples highest sample 5.52 ppb detected in 58 of 74 samples	None published	Counts toward the 60 ppb limit for haloacetic acids (HAA5)	Not above its guideline, or no guideline
Dichloroacetic acid	19.2 ppb. average of all samples highest sample 50.1 ppb detected in 68 of 74 samples	None published	Counts toward the 60 ppb limit for haloacetic acids (HAA5)	Not above its guideline, or no guideline
Haloacetic acids (HAA9)	37.4 ppb. average of all samples highest sample 61.4 ppb detected in 17 of 18 samples	None published	No federal limit	Not above its guideline, or no guideline
Lead	0.9 ppb	None published	15 ppb (EPA action level, 90th percentile)	Not above its guideline, or no guideline
Manganese	0.75 ppb. average of all samples highest sample 3 ppb detected in 1 of 4 samples	None published	No federal limit	Not above its guideline, or no guideline
Monobromoacetic acid	0.92 ppb. average of all samples highest sample 5.03 ppb detected in 45 of 74 samples	None published	Counts toward the 60 ppb limit for haloacetic acids (HAA5)	Not above its guideline, or no guideline
Monochloroacetic acid	2.16 ppb. average of all samples highest sample 11.3 ppb detected in 42 of 74 samples	None published	Counts toward the 60 ppb limit for haloacetic acids (HAA5)	Not above its guideline, or no guideline
PFBA	9.42 ppt. average of all samples highest sample 19.1 ppt detected in 4 of 6 samples	None published	No federal limit	Not above its guideline, or no guideline
PFHpA	4.78 ppt. average of all samples highest sample 14.7 ppt detected in 2 of 6 samples	None published	No federal limit	Not above its guideline, or no guideline
PFHxA	12.8 ppt. average of all samples highest sample 35.2 ppt detected in 4 of 6 samples	None published	No federal limit	Not above its guideline, or no guideline
PFPeA	13.5 ppt. average of all samples highest sample 36.9 ppt detected in 4 of 6 samples	None published	No federal limit	Not above its guideline, or no guideline
Radium-226	0.13 pCi/L. average of all samples highest sample 0.4 pCi/L detected in 1 of 3 samples	None published	Counts toward the combined 5 pCi/L limit for radium-226 and radium-228	Not above its guideline, or no guideline
Trichloroacetic acid	7.46 ppb. average of all samples highest sample 25.8 ppb detected in 63 of 73 samples	None published	Counts toward the 60 ppb limit for haloacetic acids (HAA5)	Not above its guideline, or no guideline

Results for ZIP 33010: level reported, health guideline, and legal limit or action level

Contaminant

Level reported

Health guideline (publisher)

Legal limit or action level

Multiple of guideline

Arsenic

1.7 ppb. average of all samples highest sample 2.1 ppb detected in 3 of 3 samples

0.004 ppb (California OEHHA 2004)

10 ppb

425× the health guideline

Bromodichloromethane

3.62 ppb. average of all samples highest sample 35.6 ppb detected in 58 of 73 samples

0.06 ppb (California OEHHA 2020)

Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)

60× the health guideline

Chloroform

17.6 ppb. average of all samples highest sample 153 ppb detected in 61 of 73 samples

0.4 ppb (California OEHHA 2020)

Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)

44× the health guideline

Dibromochloromethane

1.11 ppb. average of all samples highest sample 19.4 ppb detected in 20 of 73 samples

0.1 ppb (California OEHHA 2020)

Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)

11× the health guideline

Bromoform

0.56 ppb. average of all samples highest sample 1.9 ppb detected in 40 of 88 samples

0.5 ppb (California OEHHA 2020)

Counts toward the 80 ppb limit for total trihalomethanes (TTHMs)

1.1× the health guideline

PFOS

13 ppt. average of all samples highest sample 27.6 ppt detected in 4 of 6 samples

zero (EPA MCLG)

4 ppt (from 2029)