St. Petersburg Environment Guide

Tampa Bay shapes the St. Petersburg environment more than anything else: the city sits on Florida's largest open-water estuary, a 400 square mile bay that averages about 11 feet deep.

The Tampa Bay watershed covers 2,200 square miles, takes in all of Hillsborough County and parts of Pinellas, Pasco, Manatee and Polk, and sends its rain to the bay through creeks, rivers, lakes and storm drains. Dredged shipping channels cut through the shallow bay to 43 feet, and Port St. Petersburg is one of three seaports the Tampa Bay Estuary Program counts in the watershed (Tampa Bay Estuary Program). Tampa Bay supports red, black and white mangroves, with reds growing closest to the water, and mangroves are the dominant wetland vegetation type in the watershed.

The estuary program that tracks the bay is a St. Petersburg neighbor: TBEP's office is at 263 13th Ave. S., Suite 350, phone (727) 893-2765 (TBEP). On land, the City of St. Petersburg handles tree canopy and its sustainability plan, while Pinellas County writes the fertilizer and storm drain rules and runs the big county preserves at Weedon Island and Fort De Soto.

Three Digital Towns guides go deeper in this St. Petersburg section: the St. Petersburg water quality guide (who tests Tampa Bay, the beaches and the lakes), the Fort De Soto ecosystem guide (the five keys at the south end of Pinellas) and the Tampa Bay mouth guide (the estuary entrance off the southern tip of the peninsula).

Yes, by the long record: Tampa Bay water clarity improved across the bay in the 1980s after wastewater upgrades in 1979, and the 2024 seagrass maps showed the first Tampa Bay gain since 2016.

Nutrient loads to the bay were cut by the late 1970s, with upgraded wastewater treatment in 1979 as the biggest single step, and clarity improved and chlorophyll fell bay-wide in the 1980s, holding generally steady since (TBEP water quality report card). Each year the report card assigns a separate management action to each of four bay segments (Old, Hillsborough, Middle and Lower Tampa Bay), so the water off different parts of the St. Petersburg shore can land in different categories in the same year.

Seagrass is the bay's report on itself. The Southwest Florida Water Management District maps the Suncoast estuaries, Tampa Bay south to Charlotte Harbor, every two years; its 2024 maps, drawn from early 2024 imagery taken before the 2024 hurricane season, showed modest gains in Tampa Bay and Sarasota Bay, the first increase since 2016 (SWFWMD). Between the maps, TBEP crews read seagrass transects every year at over sixty locations in Tampa Bay (TBEP seagrass).

The practical point for St. Petersburg readers: the 2024 maps predate the 2024 storms, so the next Suncoast map, scheduled for 2026, is the first district measure of how the seagrass off St. Pete came through them. The St. Petersburg water quality guide covers beach sampling, lake testing and the city's wastewater system.

Three public preserves hold most of the wild land around St. Petersburg: Boyd Hill Nature Preserve on Lake Maggiore, Weedon Island Preserve on the bay in north St. Pete, and Fort De Soto Park on five keys south of the city.

Boyd Hill spans 400 acres and connects to Lake Maggiore, and its Lake Maggiore Environmental Education Center runs camps, hikes and specialty programs; admission is $3 for adults and $1.50 for children 3 to 16 (St. Petersburg Parks and Recreation).

Weedon Island Preserve is a 3,000-acre natural area on Tampa Bay in north St. Petersburg, made up mostly of marine ecosystems with some uplands, with more than 4.7 miles of boardwalks and trails and a Cultural and Natural History Center; of its two paddling trails, the north trail was listed as closed when this page was checked (Pinellas County). The preserve's own county-run site puts the size at approximately 3,195 acres instead, more than half of it north of Gandy Boulevard (Weedon Island Preserve ecosystems).

Fort De Soto, the largest park in the Pinellas County system, covers 1,136 acres on five keys holding beach plants, mangroves, wetlands, palm hammocks and hardwoods, with almost three miles of sandy beach, a fishing license required throughout the park and ferries to Egmont Key and Shell Key (Pinellas County). The Fort De Soto ecosystem guide covers the keys in detail, and the Tampa Bay mouth guide covers the water between Fort De Soto and Egmont Key.

Lawn fertilizer with nitrogen or phosphorus cannot be sold or applied in Pinellas County from June 1 through Sept. 30, and county law forbids putting any waste into the storm drains that carry St. Petersburg runoff to the bay.

The county says the summer ban exists to protect the environment during the rainy season. In every month, a strip measured 10 feet inland from the top of the bank above a seawall or shoreline stays fertilizer-free on St. Petersburg canal and bayfront lots, and the annual nitrogen ceiling the county gives is four pounds per 1,000 square feet (Pinellas County fertilizer). Reclaimed water, which many St. Petersburg yards use for irrigation, often carries nutrients already, so extra fertilizer may not be needed.

County law prohibits dumping chemicals, oil, sewage, trash and yard waste into the storm drainage system, and no connection may be made to it without proper permits. The county code's list of pollutants includes yard debris, oil and other automotive fluids, sediment, gravel, masonry materials and paint. Reports go to the Pinellas County Environmental Management Hotline at (727) 464-4425 or [email protected], which also supplies storm drain materials and bilingual English and Spanish door hangers for residents to share with neighbors (Pinellas County stormwater).

St. Petersburg had 27.2% forested land cover in its 2017 baseline, short of the 30% tree canopy goal the City adopted in 2022, and tree removal permits go through [email protected].

The city's canopy analysis split the result by City Council district: districts 2, 4, 7 and 8 were above the city-wide 27.2%, and districts 1, 3, 5 and 6 were below it; the analysis was used to identify the areas that need more planting to reach the goal (City of St. Petersburg urban forestry). The figure is out of date: the urban forestry page still calls the 2017-based 27.2% current, and it still says, in the future tense, that an updated canopy analysis based on 2022 aerial imagery would be completed in 2023, with no newer result posted there.

Before any work on or near a tree, the city asks St. Petersburg property owners to consult an arborist or the city, and it offers low-cost assessments from an on-staff ISA Certified Arborist. Owners with arborist or landscape architect documentation for an unacceptable risk tree on residential property are encouraged to email it to [email protected] so the exemption is on file and avoids an unneeded inspection (St. Pete Urban Forestry).

St. Petersburg's Integrated Sustainability Action Plan sets the city's climate action goals, including a transition to 100% Clean Energy, environmental stewardship, resiliency and racial justice.

The city calls the ISAP a blueprint for current and future sustainability and resiliency work, built on a baseline of more than 500 metrics, with a Clean Energy Roadmap and a Vulnerability Assessment as stand-alone appendices and a STAR Communities report holding baseline data from December 2016 (City of St. Petersburg plans and policies). Approval was described as the start of the work: implementation runs for years, set by priorities, budgets and community input.

One concrete piece is the city fleet. St. Petersburg's Green Fleet Advisory Group brings a representative from each department together quarterly on a Green Fleet Implementation Plan whose metrics track progress toward 100% Clean Energy and other ISAP goals (St. Petersburg ISAP page). The urban forestry page lists the 30% canopy goal next to an ISAP goal that at least 85% of residents live within a third of a mile of tree canopy or other green infrastructure that cools a neighborhood (City of St. Petersburg).

The City of St. Petersburg sends residents to the Florida Fish and Wildlife Conservation Commission for red tide conditions and fish kill reports, through the FWC Reporter app or the Fish Kill Hotline at 800-636-0511.

The city's own page notes that red tide blooms occur nearly every summer on Florida's Gulf Coast, that fish kills and odor along the waterfront are the most noticeable effects, and that current conditions come from the FWC daily sample map, conditions summary and status reports linked from the St. Petersburg site (City of St. Petersburg red tide page). Blue-green algae, which the city describes as common in Florida's fresh water, is a separate problem; the city says those blooms can appear in any month but are more frequent in summer and fall, and it asks that pets be kept away from water with a bloom.

Last verified: October 18, 2026, against the City of St. Petersburg, Pinellas County, Tampa Bay Estuary Program and SWFWMD pages cited here. Pollution in Pinellas County storm drains, as opposed to marine die-offs, goes to the county Environmental Management Hotline at (727) 464-4425 (Pinellas County).