86,000 people served, water utility, Miami-Dade County
Billing, service and outages are handled by the utility at its official website above. ScoreYourWater is not your water company and never handles water billing.
Florida Keys Aqueduct Authority has a Water Score of 50 out of 100 (Weak) on our scale. 5 of 28 detected contaminants are above a published health guideline (2018-2024). EPA compliance: no open violations (July to September 2026 extract); this is public data, not a test of your tap.
EPA treatment records (state-reported) list chloramines for Florida Keys Aqueduct Authority (J. Robert Dean WTP). EPA record
Florida Keys Aqueduct Authority (J. Robert Dean WTP) (EPA water system FL4134357) serves about 86,000 people and is in Miami-Dade County (EPA water system boundaries do not match it to any ZIP code area in our data). It does not buy water from another system, according to EPA SDWA records. In EPA SDWA, EPA UCMR and Florida DEP data from 2018-2024, 5 of 28 detected contaminants are above published health guidelines, for a Water Score of 50 (Weak); PFOA and 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). Scored against health guidelines that are stricter than legal limits, using public utility data. Not a test of your tap.
5 contaminants above health guidelines (of 28 detected), plus 2 with averages above 4.0 ppt, the limit in EPA's 2024 PFAS rule
Guideline basis: long-term cancer risk
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
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
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: 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: 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
Our systems aren't certified for PFAS.
| 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. | 46.2 pptaverage of all sampleshighest sample 50.3 pptdetected in 2 of 2 samples | 4 ppt | None published | 2023-2024 |
| PFOAEPA'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. | 9.1 pptaverage of all sampleshighest sample 9.9 pptdetected in 2 of 2 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: 4 ppb (90th percentile of tap samples, January to December 2023). 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.
| Contaminant | This utility | Legal limit or action level | Health guideline | Years |
|---|---|---|---|---|
| PFBS | 20.4 pptaverage of all sampleshighest sample 22.8 pptdetected in 2 of 2 samples | No federal limit | 2,000 ppt | 2023-2024 |
| Nitrate | 3,283 ppbaverage of all sampleshighest sample 3,500 ppbdetected in 3 of 3 samples | 10,000 ppb | None published | 2018-2020 |
| Fluoride | 472 ppbaverage of all sampleshighest sample 746 ppbdetected in 3 of 4 samples | 4,000 ppb | None published | 2018-2020 |
| Copper | 286 ppbaverage of all sampleshighest sample 570 ppbdetected in 2 of 2 samplesMeasured where water enters the distribution system, not at the tap. EPA's action level applies to tap samples. | 1,300 ppb (EPA action level, 90th percentile) | None published | 2018-2020 |
| Total trihalomethanes (TTHMs) | 29.1 ppbaverage of all sampleshighest sample 34 ppbdetected in 9 of 9 samples | 80 ppb | None published | 2018-2022 |
| Haloacetic acids (HAA9) | 24.5 ppbaverage of all sampleshighest sample 25.2 ppbdetected in 4 of 4 samples | No federal limit | None published | 2018-2019 |
| Haloacetic acids (HAA5) | 20.4 ppbaverage of all sampleshighest sample 27 ppbdetected in 9 of 9 samples | 60 ppb | None published | 2018-2022 |
| Dichloroacetic acid | 14.5 ppbaverage of all sampleshighest sample 18.3 ppbdetected in 4 of 4 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
| Barium | 12.1 ppbaverage of all sampleshighest sample 14.2 ppbdetected in 2 of 2 samples | 2,000 ppb | None published | 2018-2020 |
| PFBA | 9.4 pptaverage of all sampleshighest sample 10.2 pptdetected in 2 of 2 samples | No federal limit | None published | 2023-2024 |
| PFPeA | 3.7 pptaverage of all sampleshighest sample 4 pptdetected in 2 of 2 samples | No federal limit | None published | 2023-2024 |
| Aluminum | 3.2 ppbaverage of all sampleshighest sample 6.4 ppbdetected in 1 of 2 samples | No federal limit | None published | 2018-2020 |
| Dibromoacetic acid | 2.93 ppbaverage of all sampleshighest sample 3.5 ppbdetected in 4 of 4 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
| Selenium | 1.95 ppbaverage of all sampleshighest sample 3.9 ppbdetected in 1 of 2 samples | 50 ppb | None published | 2018-2020 |
| PFHxSEPA set a limit in 2024 and proposed withdrawing it in May 2026. | 1.7 pptaverage of all sampleshighest sample 3.4 pptdetected in 1 of 2 samples | 10 ppt | None published | 2023-2024 |
| PFHpA | 1.65 pptaverage of all sampleshighest sample 3.3 pptdetected in 1 of 2 samples | No federal limit | None published | 2023-2024 |
| PFHxA | 1.65 pptaverage of all sampleshighest sample 3.3 pptdetected in 1 of 2 samples | No federal limit | None published | 2023-2024 |
| Trichloroacetic acid | 1.25 ppbaverage of all sampleshighest sample 1.8 ppbdetected in 4 of 4 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
| Radium-226 | 0.45 pCi/Laverage of all sampleshighest sample 0.9 pCi/Ldetected in 1 of 2 samples | Counts toward the combined 5 pCi/L limit for radium-226 and radium-228 | None published | 2018-2020 |
| Monochloroacetic acid | 0.35 ppbaverage of all sampleshighest sample 1.4 ppbdetected in 1 of 4 samples | Counts toward the 60 ppb limit for haloacetic acids (HAA5) | None published | 2020-2022 |
EPA water system boundaries do not match Florida Keys Aqueduct Authority (J. Robert Dean WTP) to any ZIP code area in our data.
Source: EPA Water System Boundaries overlaid on Census ZIP code areas. Your water bill names your utility.
None recorded in EPA SDWIS for compliance periods starting since Jul 1, 2021.
Source: EPA Safe Drinking Water Information System (SDWA bulk extract, July to September 2026).
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.
Florida Keys Aqueduct Authority is the main water provider for Miami-Dade County. Some addresses can be served by a different system, so check your water bill: it names your utility.
Call (305) 296-2454 or visit https://www.fkaa.com/. Billing and outages are handled by the utility, not by ScoreYourWater.
EPA water system boundaries do not match Florida Keys Aqueduct Authority (J. Robert Dean WTP) to any ZIP code area in our data. Your water bill names your utility. Source: EPA Water System Boundaries (CWS service area boundaries) v3.0, March 2026 release.
Florida Keys Aqueduct Authority (J. Robert Dean WTP) does not buy water from another system, according to EPA SDWA records. No other utility in this data buys water from it. (July to September 2026 extract.)
5 of 28 detected contaminants were above their published health guidelines in EPA SDWA, EPA UCMR and Florida DEP data, 2018-2024. The highest: Bromodichloromethane at 145 times its guideline, Arsenic at 100 times its guideline and Chloroform at 46 times its guideline. PFOA and 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).
Chloramine is a disinfectant made by combining chlorine and ammonia. Some water systems use it in place of free chlorine. The public data used on this site (EPA SDWA, EPA UCMR and Florida DEP data) does not record which disinfectant Florida Keys Aqueduct Authority (J. Robert Dean WTP) uses, so we do not say. Your utility can tell you.
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 2 (PFOA and PFOS average above 4.0 ppt, the limit in EPA's 2024 PFAS rule) is 50, so the score is 50.
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.