York, SC
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 York in South Carolina · Population: 288,559
TRI sites such as New-Indy Catawba LLC; Honeywell Safety Products; Pbi Performance Products Inc; SDWIS systems such as ROCK HILL CITY OF (SC4610002); YORK COUNTY EAST WD (SC4620002); FORT MILL TOWN OF (SC4610003); NPL sites such as Leonard Chemical Co., Inc.; Rock Hill Chemical Co. anchor York, SC's EPA extract. Derived burden score 75/100 (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 York include YORK COUNTY EAST WD (SC4620002); YORK COUNTY WEST WD (SC4620003); YORK CITY OF (SC4610001), while New-Indy Catawba LLC leads reported TRI pounds among local Form R filers. AQS median AQI 46 / peak 112 in 2024.
Burden score 75/100 (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 York -- 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 York, SC: EPA TRI 2023 reporting year
Same facilities, both years
-7.8%
26 facilities that filed in 2022 and 2023
Whole inventory
-7.8%
3.5 million lb → 3.2 million lb, every facility that filed
Between the two reporting years, 4 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- York, SC's total reported releases fell from 3.5 million lb in 2022 to 3.2 million lb in 2023, based on EPA TRI filings.
- York, SC's off-site transfers fell from 449.1 thousand lb in 2022 to 327.7 thousand lb in 2023, based on EPA TRI filings.
- York, SC's water releases fell from 460.3 thousand lb in 2022 to 431.1 thousand lb in 2023, based on EPA TRI filings.
- York, SC's air releases fell from 2.3 million lb in 2022 to 2.2 million 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 | 226 (62%) | 136 | 1 | 112 |
| 2023 | 213 (58%) | 149 | 3 | 115 |
| 2022 | 253 (70%) | 109 | 1 | 126 |
| 2021 | 257 (71%) | 103 | 0 | 97 |
| 2020 | 303 (83%) | 63 | 0 | 93 |
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 South Carolina, see the EPA's AirNow.gov.
Water Systems (41)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ROCK HILL CITY OF (SC4610002) | 89,850 | 0 |
| YORK COUNTY EAST WD (SC4620002) | 30,225 | 12 |
| FORT MILL TOWN OF (SC4610003) | 25,000 | 0 |
| YORK COUNTY WEST WD (SC4620003) | 18,273 | 1 |
| YORK CITY OF (SC4610001) | 11,137 | 18 |
| TEGA CAY CITY OF (SC4610008) | 10,500 | 0 |
| CLOVER TOWN OF (SC4610006) | 8,400 | 2 |
| RIVERVIEW RURAL CWS (SC4620001) | 2,200 | 1 |
| HICKORY GROVE TOWN OF (SC4610004) | 654 | 0 |
| SHARON TOWN OF (SC4610005) | 573 | 0 |
| TWIN LAKES ESTATES (SC4660007) | 550 | 0 |
| CATAWBA INDIAN NATION CWS (SC4650063) | 446 | 7 |
| GLEN AT CLOVER LLC THE (SC4660064) | 300 | 2 |
| CEDAR VALLEY MHP (SC4660009) | 290 | 1 |
| GREEN EARTH PWS (SC4610009) | 280 | 0 |
| CONCORD ESTATES | 257 | 0 |
| FG COMMUNITIES AT GASTONIA ESTATES | 231 | 0 |
| QUAIL MEADOWS PARK LLC (SC4660063) | 221 | 0 |
| LAKE WHEELER MHP | 180 | 2 |
| CHUCKS MHP (SC4660077) | 168 | 1 |
| GOODS MHP (SC4660098) | 128 | 0 |
| WILLWOOD S/D (4650004) | 122 | 0 |
| RAE MCKENZIE MOBILE HOME PARK | 100 | 1 |
| FERN FOREST MHP (SC4660001) | 99 | 0 |
| WHITLEY ESTATES (4660055) | 93 | 0 |
| WATERLYNN DOWNS (SC4660045) | 92 | 2 |
| PINEHAVEN S/D (SC4650037) | 81 | 0 |
| HENSON MHP (4660111) | 65 | 0 |
| REEDY CREEK MHP | 64 | 2 |
| MEADOWVIEW TRAILER COURT | 60 | 6 |
| BGWC DUTCHMAN ACRES (SC3250028) | 60 | 0 |
| DUNCAN MHP (SC4660093) | 60 | 1 |
| PECAN GROVE COMMONS (SC4660003) | 58 | 0 |
| LOST COLONY S/D (SC4650019) | 54 | 0 |
| PINE HAVEN MHP | 53 | 3 |
| SCOTLAND YARD MHP (SC4660105) | 53 | 0 |
| LAMBERT MHP (SC4660108) | 50 | 0 |
| TWIN OAKS MOBILE HOME PARK | 50 | 0 |
| CAROLINA HIGHLANDS RETIRE PARK | 45 | 1 |
| CARROLL MHP 2 (SC4660088) | 35 | 0 |
| CARROLL MHP 1 (SC4660087) | 25 | 0 |
TRI Facilities (35)
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Leonard Chemical Co., Inc. | NPL Site | 47.10 |
| Rock Hill Chemical Co. | NPL Site | 40.29 |
Cities in York (8)
Frequently Asked Questions
What is the environmental risk level in York, South Carolina? ▼
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How many toxic release facilities are in York? ▼
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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.