Horry, 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.
Environmental data for Horry in South Carolina · Population: 368,937
TRI sites such as New South Lumber & Wood Preserving Cos. - Conway Plant; Aalberts Integrated Piping Systems Americas; Wolverine Brass Inc; SDWIS systems such as N MYRTLE BEACH CITY OF (SC2610011); CONWAY CITY OF (SC2610008); CONWAY RURAL (SC2620001) anchor Horry, SC's EPA extract. Derived burden score 32/100 (Moderate 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 Horry include LAKE VIEW TOWN OF (SC1710003), while New South Lumber & Wood Preserving Cos. - Conway Plant leads reported TRI pounds among local Form R filers. AQS median AQI 40 / peak 87 in 2024.
Burden score 32/100 (Moderate 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 Horry -- 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 Horry, SC: EPA TRI 2023 reporting year
Same facilities, both years
-57.6%
10 facilities that filed in 2022 and 2023
Whole inventory
-57.6%
130.3 thousand lb → 55.3 thousand lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Horry, SC's total reported releases fell from 130.3 thousand lb in 2022 to 55.3 thousand lb in 2023, based on EPA TRI filings.
- Horry, SC's off-site transfers fell from 97.2 thousand lb in 2022 to 21.2 thousand lb in 2023, based on EPA TRI filings.
- Horry, SC's chemicals reported rose from 14 in 2022 to 15 in 2023, based on EPA TRI filings.
- Horry, SC's air releases rose from 33.1 thousand lb in 2022 to 34.1 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 | 287 (79%) | 77 | 0 | 87 |
| 2023 | 238 (72%) | 94 | 0 | 100 |
| 2022 | 247 (94%) | 16 | 0 | 93 |
| 2021 | 238 (90%) | 26 | 0 | 90 |
| 2020 | 214 (100%) | 0 | 0 | 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 South Carolina, see the EPA's AirNow.gov.
Water Systems (10)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| N MYRTLE BEACH CITY OF (SC2610011) | 43,883 | 0 |
| CONWAY CITY OF (SC2610008) | 27,005 | 0 |
| CONWAY RURAL (SC2620001) | 12,740 | 0 |
| OCEAN LAKES LTD (SC2660048) | 10,727 | 0 |
| GSW&SA-MARION CITY OF (SC3310001) | 9,104 | 0 |
| MULLINS CITY OF (SC3310002) | 7,366 | 0 |
| LAKEWOOD CAMPGROUND (SC2660049) | 4,415 | 0 |
| LORIS CITY OF (SC2610010) | 4,350 | 0 |
| LAKE VIEW TOWN OF (SC1710003) | 1,293 | 3 |
| GSW&SA-NICHOLS TOWN OF (3310003) | 678 | 0 |
TRI Facilities (15)
| # | Facility | Total Releases |
|---|---|---|
| 1 | New South Lumber & Wood Preserving Cos. - Conway Plant | 180.2K lbs |
| 2 | Aalberts Integrated Piping Systems Americas | 143.3K lbs |
| 3 | Wolverine Brass Inc | 260 lbs |
| 4 | Avx Corp Myrtle Beach | 157 lbs |
| 5 | Concrete Supply Co. LLC - Conway | 11 lbs |
| 6 | Concrete Supply Co - South Myrtle Beach | 1 lbs |
| 7 | Argos Ready Mix Surfside Concrete Plant | 0 lbs |
| 8 | S&w Little River Plant | 0 lbs |
| 9 | Ready Mixed Concrete #64 Conway | 0 lbs |
| 10 | S&w Murrells Inlet | 0 lbs |
| 11 | Argos Ready Mix N Myrtle Beach Concrete Plant | 0 lbs |
| 12 | Rinker Myrtle Beach Pipe | 0 lbs |
| 13 | Concrete Supply Co Llc-Nmb | 0 lbs |
| 14 | S&w Conway Plant | 0 lbs |
| 15 | Metglas Inc | 0 lbs |
Cities in Horry (8)
Frequently Asked Questions
What is the environmental risk level in Horry, South Carolina? ▼
Are there Superfund sites in Horry? ▼
How many toxic release facilities are in Horry? ▼
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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.