Hillsborough, FL
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Hillsborough in Florida · Population: 1,489,634
Hillsborough, FL is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 142 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 72/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 12.4M lbs of reported toxic releases under EPCRA Section 313, while 22 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 50 and a peak AQI of 143 in 2024, with 52% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
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 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 | Population | Violations |
|---|---|---|
| CITY OF TAMPA WATER DEPARTMENT | 733,886 | 0 |
| HCWRD/SOUTH-CENTRAL | 473,500 | 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 |
| CYPRESS CAY PRESERVE MASTER ASSOCIATION | 1,500 | 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 |
| 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 |
| HASELTON VILLAGE | 500 | 0 |
| FLORIDIAN RV RESORT | 450 | 5 |
| THOUSAND TRAILS - MORGAN HILL | 413 | 0 |
| 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 |
| PINE OAKS MHP | 312 | 0 |
| EASTFIELD SLOPES CONDO ASSOC | 300 | 0 |
| GLENDALE VILLAS / LOL VILLAGE APTS | 298 | 1 |
| LIBERTY SHORES | 290 | 0 |
| FOREST GREEN MHP | 283 | 0 |
| LAKESIDE VILLAGE I | 280 | 0 |
| SPEER MHP | 270 | 0 |
| WOODDALE MHP | 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 |
| MOUNT CARMEL RIDGE | 219 | 0 |
| CHARLIES MHP | 218 | 0 |
| BAY HILLS VILLAGE CONDO ASSOCIATION | 218 | 0 |
| HAPPY HOMES MOBILE HOME PARK | 215 | 0 |
| WINDWARD KNOLL MHP | 208 | 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 |
| 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 |
| 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 |
| SILVER LAKE UTILITY- BUCKHORN HOUSING | 40 | 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 |
| 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)
Cities in Hillsborough (8)
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.