Hillsborough, FL
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
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.
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 |
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)
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)
Frequently Asked Questions
What is the environmental risk level in Hillsborough, Florida? ▼
Are there Superfund sites in Hillsborough? ▼
How many toxic release facilities are in Hillsborough? ▼
What is the air quality in Hillsborough? ▼
Is the drinking water safe in Hillsborough? ▼
What environmental agencies cover Hillsborough? ▼
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.
Read our methodology - how this data is sourced, computed, and verified.