What is the address of Key Largo WWTP?

The address on the plant’s EPA facility record is 103200 Overseas Highway Ste 12, Key Largo, FL, in Monroe County. Its coordinates are 25.1007, -80.4317. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Key Largo WWTP treat?

Key Largo WWTP treats an average of 3.45 MGD and is permitted for a design flow of 3.45 MGD.

What treatment technology does Key Largo WWTP use?

Klarifi has identified 4 treatment structures and unit processes at the Key Largo facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Key Largo WWTP?

The facility discharges under NPDES permit FLA370967, currently effective, expiring October 2031.

Who operates Key Largo WWTP and how do I contact them?

Key Largo WWTP is a publicly owned treatment works in Key Largo, Florida. Klarifi lists 1 verified decision-maker contact for this facility, available with a free trial.

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Key Largo WWTP

103200 Overseas Highway Ste 12, Key Largo, FL · Monroe County · Publicly Owned Treatment Works

Average flow: 3.45 MGD

Design flow: 3.45 MGD

NPDES permit: FLA370967; Effective

Permit expires: October 2031

Population served: —; CWNS 2022

Key Largo WWTP is a publicly owned wastewater treatment works in Key Largo, Monroe County, Florida treating an average of 3.45 million gallons per day against a permitted design capacity of 3.45 MGD. It discharges under NPDES permit FLA370967 (effective), which expires in October 2031.

Treatment technology

4 treatment structures and unit processes identified at Key Largo WWTP.

Available with a free Klarifi account

See the full treatment train at Key Largo WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: —

Effluent violations: —

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

1 verified contact for Key Largo WWTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at Key Largo WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Florida

Cross Key WWTP

Key Largo · 9 mi away

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North Key Largo WWTP

Key Largo · 18 mi away

0.5 MGD

Homestead, City Of

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Homestead Bayfront Park WWTF

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Uf Tropical Research Center

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Redlands School WWTP - Dcps

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City Of Layton WWTP

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0.07 MGD

Mdwasa South District WWTF

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Key Largo WWTP: frequently asked questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed October 26, 2026; facility record last updated October 22, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms

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