Hillsborough, FL

High Risk (97/100)

Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.

Environmental data for Hillsborough in Florida · Population: 1,489,634

TRI sites such as Envirofocus Technologies; Mosaic Fertilizer Llc-Riverview; Tampa Electric Co Big Bend Power Station; SDWIS systems such as CITY OF TAMPA WATER DEPARTMENT; HCWRD/SOUTH-CENTRAL; HCWRC/NORTHWEST UTILITIES; NPL sites such as Alaric Area Ground Water Plume; Arkla Terra Property; Helena Chemical Co. (Tampa Plant) anchor Hillsborough, FL's EPA extract. Derived burden score 97/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.

Health-flagged SDWIS rows in Hillsborough include FGUA / MACDILL; BULOW PLANTATION; PALM TREE ACRES MHP, while Envirofocus Technologies leads reported TRI pounds among local Form R filers. AQS median AQI 50 / peak 143 in 2024.

Burden score 97/100 (High Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Hillsborough -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.

Release-over-release change

What changed for Hillsborough, FL: EPA TRI 2023 reporting year

2022 → 2023

Same facilities, both years

-5.3%

67 facilities that filed in 2022 and 2023

Whole inventory

-5.5%

2.9 million lb → 2.8 million lb, every facility that filed

Between the two reporting years, 2 facilities filed for the first time and 5 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.

  • Hillsborough, FL's total reported releases fell from 2.9 million lb in 2022 to 2.8 million lb in 2023, based on EPA TRI filings.
  • Hillsborough, FL's water releases fell from 25.3 thousand lb in 2022 to 18.2 thousand lb in 2023, based on EPA TRI filings.
  • Hillsborough, FL's land releases fell from 101.0 thousand lb in 2022 to 86.8 thousand lb in 2023, based on EPA TRI filings.
  • Hillsborough, FL's air releases fell from 498.1 thousand lb in 2022 to 439.7 thousand lb in 2023, based on EPA TRI filings.
County population (Census ACS)
1,489,634
TRI Facilities
50
Water Systems
142
Superfund Sites
17
Total Releases
12.4M lbs

Air Quality History (2020–2024)

EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.

Year Good Moderate Unhealthy (SG) Max AQI
2024 190 (52%) 168 4 143
2023 156 (43%) 206 3 114
2022 175 (48%) 189 1 126
2021 167 (46%) 197 1 129
2020 176 (48%) 187 3 112
2024 Good Air Quality: 52% of days
Unhealthy days: 4
Median AQI: 50

Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)

For real-time air quality readings and pollutant breakdowns in Florida, see the EPA's AirNow.gov.

Water Systems (142)

System System pop (SDWIS) Violations
CITY OF TAMPA WATER DEPARTMENT 733,886 0
HCWRD/SOUTH-CENTRAL 515,012 0
HCWRC/NORTHWEST UTILITIES 208,982 0
UNIVERSITY OF SOUTH FLORIDA 47,586 0
CITY OF PLANT CITY UTILITY 41,601 0
CITY OF TEMPLE TERRACE UTILITY 31,250 0
HCWRD/SEABOARD UTILITIES 13,958 0
FGUA / MACDILL 11,965 2
HCWRC/PEBBLE CREEK SUBDIVISION 4,757 0
CLERBROOK RV RESORTS (2 WPS) 3,142 0
WINDEMERE UTILITY 3,080 0
MID-FLORIDA LAKES YACHT CLUB 3,065 0
HCWRD/EASTLAKE 2,074 0
AYLA APARTMENTS 1,344 0
STARLIGHT RANCH MOBILE HOME ESTATES 1,221 0
MARALAGO CAY MHP 1,200 0
BRANDON POINTE COMMUNITY 1,001 0
FISHHAWK RIDGE ASSOCIATION INC 1,001 0
BULOW PLANTATION 1,000 6
SOUTH SHORE FALLS SOUTH MASTER METER #1 995 0
OAK SPRINGS MOBILE HOME PARK 993 0
HACIENDA VILLAGE MHP 960 0
HIDDEN VALLEY MOBILE HOME PARK 907 0
MHC TT INC. (DBA PIO PICO) 828 0
HCWRD/HERSHEL HEIGHTS 812 0
TOBY'S PLANTATION RV RESORT 700 0
RIVER VISTA RV VILLAGE 684 0
HCWRC/OAKVIEW ESTATES 643 0
ORANGE LAKE MH COMMUNITY 615 0
OAK BEND MHP 600 0
LITTLE MANATEE SPRINGS MHP 530 0
TROPICAL PALMS MHP 508 0
HASELTON VILLAGE 500 0
PALM TREE ACRES MHP 500 1
FLORIDIAN RV RESORT 450 5
SOUTH SHORE FALLS NORTH MASTER METER #2 400 0
WOODLAND LAKES MHP 376 0
SAN JOSE MISSION 375 0
RAINBOW LAKE MANOR MHP 350 0
OAK HILL VILLAGE MHP 320 0
MOUNT CARMEL RIDGE 316 0
PINE OAKS MHP 312 0
EASTFIELD SLOPES CONDO ASSOC 300 0
GLENDALE VILLAS / LOL VILLAGE APTS 298 1
LIBERTY SHORES 290 0
LAKESIDE VILLAGE I 280 0
SPEER MHP 270 0
BEDROCK WOOD DALE LLC 266 0
THE LAKES OF WELLINGTON 260 0
STRAWBERRY FIELDS MHP 250 29
ROBINSON ORANGE MHP 250 0
CAMELOT MHP 240 1
HCWRD/SAN REMO SUBDIVISION 232 8
CHARLIES MHP 218 0
BAY HILLS VILLAGE CONDO ASSOCIATION 218 0
STRAWBERRY SQUARE MHP 200 0
MAGNOLIA HILL MOBILE HOME PARK 200 0
PROMENADE SUBDIVISION 200 0
CORAL RIDGE ESTATES MHP 200 2
LAKESIDE VILLAGE II 191 0
VILLAGE CENTRE TOWNHOMES 180 0
CHAPMAN'S M.H.P. 180 1
VALRICO MHP LLC 160 0
42ND STREET APARTMENTS 160 0
ENCORE-SUNSHINE HOLIDAY DAYTONA PARK 156 1
GRACELAND ESTATES 152 0
IMPERIAL OAKS 150 0
RANCH OAKS ESTATES 148 3
BEDROCK LITTLE MANATEE 140 0
MAYGROVE MHP 140 0
HIDDEN OAKS MHP 135 0
VILLAGES OF OCALA 132 0
LIVINGSTON MHP 130 0
GRAND VILLAGE MHP WEST 126 1
PINE LAKE MOBILE HOME PARK 124 1
LIVE OAKS MOBILE HOME PARK 120 0
ORANGE BLOSSOM TRAILER PARK 117 0
THE PALMS AT DOVER MHP 114 0
HOPE CHILDREN'S HOME 114 0
THE OASIS MHP 100 1
MANATEE RV RUSKIN LLC 100 0
PLEASANT GROVE ASSEMBLY OF GOD 100 0
MCN MOBILE HOME PARK 95 0
COMMERCE PARK SUN ESTATES 1 93 0
PATRICIA HEARD MLC 88 0
TAMPA SUN ESTATES #5 87 0
HCWRD/FAIRVIEW MHP 86 0
DUFFEY TRAILER PARK 85 0
CHURCH OF GOD CAMPGROUND 80 0
G ; H MOBILE HOME PARK INC 80 15
BRIARWOOD ESTATES 80 0
LINWOOD OAKS M. H. P. 78 1
PARK VILLAGE MHP 72 0
PLANTATION LANDING MHP 70 0
CRAWFORD 3 B'S MHP 70 1
SKIPPER MHP 70 0
STONE LEDGE MANOR 68 0
DOWNING, LLC 67 0
TAMPA SUN ESTATES #6 66 0
ON THE PARK TOWNHOMES 65 0
GREEN OAKS MHP 62 0
SILVER LAKE UTILITY- BUCKHORN HOUSING 60 0
FLYING CLOUD TP 60 0
LA CASA MIA 60 0
COUNTRYSIDE VILLAGE 60 0
ASHLEY OAKS MOBILE HOME PARK 60 0
MUSA MHP #1 60 0
SUNNY ACRES MOBILEHOME PARK 60 0
HCWRD/CYPRESS COVE SUBDIVISION 59 0
REGENCY OAKS 58 0
SPRINGTREE APTS 52 0
BLUE SPRINGS MHP (AKA SPRINGSIDE) 50 0
COUNTRYSIDE MHP 50 0
TAMPA SUN ESTATES 4 50 2
THE PALMS OF PLANT CITY II 50 0
RUSKIN MOBILE HOME PARK 49 0
GREEN ACRES 45 0
COMMERCE PARK SUN ESTATES 2 42 0
SELF MOBILE HOME SITES 42 0
FRESH START MHP 41 0
RIVERSIDE MHP 40 0
GARDEN SPRINGS MHP 40 0
GOLDEN OAKS APTS 40 0
SUNLAND MHP 40 0
CROFT'S MOBILE HOME PARK 40 1
CRYSTAL KAY MOBILE HOME PARK 39 0
LONE OAKS MOBILE ESTATES 38 4
EVERYDAY BLESSINGS INC 36 0
IRIS COURT APARTMENTS SOUTH 36 0
MAGNOLIA TP 30 0
SOUTHERN PALMS MHP 30 0
BURRELL DUPLEXES 30 0
OAKS MEADOWS RENTALS 30 0
TENOROC PARK LLC 30 1
SAFFOLD FARMS #1 29 0
GRAND VILLAGE MHP - EAST 28 1
DOGWOOD HAVEN APARTMENTS 28 0
P AND P MOBILE HOME PARK 26 0
HAPPY ACRES MHP 25 0
LAKE ROSE VILLAGE 25 0
MG TRAILER PARK 25 0
EAST POINT ASSEMBLY OF GOD 25 0

TRI Facilities (50)

# Facility Total Releases
1 Envirofocus Technologies 7.5M lbs
2 Mosaic Fertilizer Llc-Riverview 1.8M lbs
3 Tampa Electric Co Big Bend Power Station 731.2K lbs
4 Gulf Marine Repair Corp 576.6K lbs
5 Saputo Cheese USA Inc 462.6K lbs
6 Ball Metal Beverage Container Corp 375.7K lbs
7 US Ecology Tampa Inc 296.3K lbs
8 International Ship Repair & Marine Services Inc. 125.5K lbs
9 Valmont - Tampa Galvanizing 113.4K lbs
10 Tampa Ship LLC 112.1K lbs
11 Tampa Steel Erecting Co 100.5K lbs
12 Mplx Terminals LLC - Tampa Fl Terminal 47.0K lbs
13 Bertram Yachts LLC 37.9K lbs
14 Global Port Tampa Terminal 20.0K lbs
15 Univar Solutions USA 19.4K lbs
16 Lv Thompson Inc DBA Tamco 16.1K lbs
17 Citgo Petroleum Corp 11.3K lbs
18 Reddy Ice-Plant City (413) 10.2K lbs
19 Tampa Bay Fisheries Inc 9.5K lbs
20 Chromalloy Castings 8.1K lbs
21 Clarios LLC 7.7K lbs
22 Qg Printing II Corp 7.2K lbs
23 Sun Coatings Inc 4.4K lbs
24 Ufp Tampa LLC 3.9K lbs
25 Anuvia Plant City LLC 3.7K lbs
26 Leslie Controls 3.7K lbs
27 Chevron Port Tampa Terminal 3.2K lbs
28 Safety-Kleen Systems Tampa (tam) 2.8K lbs
29 U.S. Dod, Usaf, Macdill Afb 2.4K lbs
30 Chemex Inc 2.3K lbs
31 Airgas USA LLC 1.9K lbs
32 Advanced Airfoil Components 1.9K lbs
33 James Hardie Building Products Plant City 1.1K lbs
34 Kimball Electronics Tampa 875 lbs
35 Hmf Express LLC 552 lbs
36 Martin Operating Ptnr-Tampa 537 lbs
37 Associated Asphalt Tampa LLC 513 lbs
38 Gold Bond Building Products - Apollo Beach 323 lbs
39 Associated Asphalt Tampa LLC 104 lbs
40 Leader Tech Inc. 55 lbs
41 Sypris Electronics LLC 31 lbs
42 Axon Circuit Inc 22 lbs
43 Port of Tampa 21 lbs
44 Chemical Formulators Inc 15 lbs
45 Building Materials Manufacturing LLC 8 lbs
46 Preferred Materials Inc-Tampa Asphalt Plant 8 lbs
47 Separation Technologies LLC 3 lbs
48 Argos Cement LLC 2 lbs
49 78TH Street Ready Mix Plant 1 lbs
50 Argos Linebaugh Ready Mix Plant 1 lbs

Superfund Sites (17)

Site Name Status HRS Score
Alaric Area Ground Water Plume NPL Site 41.91
Arkla Terra Property NPL Site 50.00
Helena Chemical Co. (Tampa Plant) NPL Site 30.19
JJ Seifert Machine NPL Site 50.00
Kassauf-Kimerling Battery Disposal Deleted NPL Site 53.42
MRI Corp (Tampa) NPL Site 37.62
Normandy Park Apartments Proposed NPL Site 49.98
Peak Oil Co./Bay Drum Co. NPL Site 58.15
Raleigh Street Dump NPL Site 50.00
Reeves Southeastern Galvanizing Corp. NPL Site 58.75
Schuylkill Metals Corp. Deleted NPL Site 59.16
Sixty-Second Street Dump Deleted NPL Site 49.09
Southern Solvents, Inc. NPL Site 50.00
Stauffer Chemical Co (Tampa) NPL Site 59.81
Sydney Mine Sludge Ponds NPL Site 38.93
Taylor Road Landfill NPL Site 51.37
Tri-City Oil Conservationist, Inc. Deleted NPL Site 39.30

Cities in Hillsborough (17)

Tampa
58 facilities · 77 water
Plant City
10 facilities · 9 water
Gibsonton
5 facilities · 0 water
Riverview
4 facilities · 5 water
Apollo Beach
2 facilities · 2 water
Dover
1 facilities · 8 water
Lutz
1 facilities · 6 water
Ruskin
1 facilities · 5 water
Brandon
0 facilities · 21 water
Thonotosassa
0 facilities · 7 water
Wimauma
0 facilities · 3 water
Lithia
0 facilities · 2 water
Mango
0 facilities · 2 water
Seffner
0 facilities · 2 water
Durant
0 facilities · 1 water
Temple Terrace
0 facilities · 1 water
Valrico
0 facilities · 1 water

Frequently Asked Questions

What is the environmental risk level in Hillsborough, Florida?
Hillsborough, FL has an environmental risk score of 97/100 (High Risk), based on 50 TRI facilities, 17 Superfund sites, and 142 water systems on record. 23 water systems have health-based violations. Source: EPA TRI, SDWIS, and Superfund NPL.
Are there Superfund sites in Hillsborough?
Yes, Hillsborough, FL has 17 Superfund sites on the EPA National Priorities List (NPL). Superfund sites are contaminated locations that require long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
How many toxic release facilities are in Hillsborough?
Hillsborough, FL has 50 TRI-reporting facilities on record with the EPA Toxic Release Inventory, with a combined total of 12.4M lbs in reported toxic releases. TRI facilities self-report annual chemical release data to the EPA.
What is the air quality in Hillsborough?
In 2024, Hillsborough, FL recorded a median AQI of 50 and a peak AQI of 143. 52% of monitored days had "Good" air quality (AQI 0–50). Source: EPA Air Quality System (AQS) Annual AQI by County.
Is the drinking water safe in Hillsborough?
Hillsborough, FL has 142 EPA-regulated water systems. 23 systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental agencies cover Hillsborough?
Environmental compliance in Hillsborough, Florida is overseen by the U.S. Environmental Protection Agency (EPA) at the federal level and the Florida state environmental agency. Facilities report to the EPA Toxic Release Inventory, water systems are regulated under the Safe Drinking Water Act, and contaminated sites are managed under the Superfund program. Contact your state environmental agency for local concerns.

What does this county environmental profile show?

This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.

Related

Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro