York, SC
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 York in South Carolina · Population: 288,559
York, SC is tracked across three EPA datasets covering 35 Toxics Release Inventory (TRI) facilities, 38 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 65/100 (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 14.8M lbs of reported toxic releases under EPCRA Section 313, while 17 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 46 and a peak AQI of 112 in 2024, with 62% 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 | 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 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 (38)
| System | Population | Violations |
|---|---|---|
| YORK COUNTY EAST WD (SC4620002) | 30,225 | 12 |
| FORT MILL TOWN OF (SC4610003) | 25,000 | 0 |
| YORK COUNTY WEST WD (SC4620003) | 18,273 | 1 |
| TEGA CAY CITY OF (SC4610008) | 10,500 | 0 |
| YORK CITY OF (SC4610001) | 8,700 | 12 |
| 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 |
| ADNAH HILLS MHP (SC4660115) | 350 | 1 |
| GLEN AT CLOVER LLC THE (SC4660064) | 300 | 2 |
| CEDAR VALLEY MHP (SC4660009) | 290 | 1 |
| GREEN EARTH PWS (SC4610009) | 280 | 0 |
| CONCORD ESTATES | 257 | 0 |
| QUAIL MEADOWS PARK LLC (SC4660063) | 221 | 0 |
| LAKE WHEELER MHP | 180 | 1 |
| 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 | 1 |
| PINEHAVEN S/D (SC4650037) | 81 | 0 |
| MOUNTAIN VIEW MHP | 67 | 1 |
| HENSON MHP (4660111) | 65 | 0 |
| DUNCAN MHP (SC4660093) | 60 | 1 |
| PECAN GROVE COMMONS (SC4660003) | 58 | 0 |
| LOST COLONY S/D (SC4650019) | 54 | 0 |
| PINE HAVEN MHP | 53 | 2 |
| 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)
Cities in York (4)
Frequently Asked Questions
What is the environmental risk level in York, South Carolina? ▼
Are there Superfund sites in York? ▼
How many toxic release facilities are in York? ▼
What is the air quality in York? ▼
Is the drinking water safe in York? ▼
What environmental agencies cover York? ▼
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.