Union, AR
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 Union in Arkansas · Population: 38,368
Union, AR is tracked across three EPA datasets covering 17 Toxics Release Inventory (TRI) facilities, 30 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 57/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 29.2M lbs of reported toxic releases under EPCRA Section 313, while 21 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 49 and a peak AQI of 93 in 2024, with 51% 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 | 62 (51%) | 59 | 0 | 93 |
| 2023 | 59 (50%) | 59 | 1 | 102 |
| 2022 | 65 (57%) | 50 | 0 | 100 |
| 2021 | 66 (57%) | 50 | 0 | 74 |
| 2020 | 74 (61%) | 47 | 0 | 90 |
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 Arkansas, see the EPA's AirNow.gov.
Water Systems (30)
| System | Population | Violations |
|---|---|---|
| EL DORADO WATERWORKS | 17,932 | 6 |
| SMACKOVER WATERWORKS | 2,821 | 2 |
| PARKERS CHAPEL PUBLIC WATER | 2,391 | 2 |
| FRENCHPORT WATER ASSOCIATION | 1,793 | 0 |
| WILDWOOD WATER ASSOCIATION | 1,350 | 2 |
| FAIRCREST WATER ASSOCIATION | 1,329 | 6 |
| OLD UNION PUBLIC WATER AUTHORITY | 1,200 | 12 |
| NEW HOPE WATER ASSOCIATION | 1,136 | 2 |
| STRONG WATERWORKS | 1,131 | 4 |
| NORPHLET WATERWORKS | 1,112 | 2 |
| LAWSON-URBANA WATER ASSOC | 1,108 | 4 |
| MARYSVILLE WATER ASSOCIATION | 867 | 2 |
| NEW LONDON WATER ASSOCIATION | 850 | 76 |
| HUTTIG WATERWORKS | 733 | 3 |
| QUINN WATER ASSOCIATION | 729 | 0 |
| JUNCTION CITY WATERWORKS | 726 | 4 |
| JUNCTION CITY WATER SYSTEM | 708 | 4 |
| WESSON-NEWELL WATER ASSOC | 658 | 0 |
| JOHNSON TOWNSHIP WATER ASSOC | 600 | 10 |
| BATTS-LAPILE WATER ASSOCIATION | 583 | 2 |
| CALION WATER WORKS | 494 | 0 |
| WARD NINE WATER SYSTEM | 489 | 10 |
| LISBON WATER ASSOCIATION | 439 | 0 |
| MOUNT HOLLY WATERWORKS | 384 | 0 |
| OAK MANOR WATER ASSOCIATION | 338 | 0 |
| HARMONY WATER ASSOCIATION | 336 | 26 |
| RANDOLPH WATER SYSTEM | 249 | 32 |
| BANKS WATERWORKS | 244 | 18 |
| LOUANN WATERWORKS | 170 | 0 |
| FELSENTHAL WATER AND SEWER | 150 | 0 |
TRI Facilities (17)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Clean Harbors el Dorado LLC | 16.6M lbs |
| 2 | Lsb Chemical L.l.c | 4.2M lbs |
| 3 | Lanxess - Central | 3.4M lbs |
| 4 | Lanxess - South Plant | 2.1M lbs |
| 5 | Lion Oil Co | 2.0M lbs |
| 6 | Lycus Ltd | 389.0K lbs |
| 7 | Roseburg Forest Products - el Dorado Mdf | 247.8K lbs |
| 8 | Anthony Forest Products Co Urbana | 120.0K lbs |
| 9 | Prescolite Inc. | 104.1K lbs |
| 10 | Chemours el Dorado | 61.7K lbs |
| 11 | Anthony Forest Products Co LLC - Laminating Plant | 13.5K lbs |
| 12 | Shaw el Dorado LLC | 2.8K lbs |
| 13 | Nexans Amercable Inc. | 2.6K lbs |
| 14 | Martin Operating Ptnr LP | 2.5K lbs |
| 15 | Continental Carbonic Products Inc. | 493 lbs |
| 16 | Milbank Manufacturing Co | 0 lbs |
| 17 | Quality Mill of Arkansas LLC | 0 lbs |
Cities in Union (3)
Frequently Asked Questions
What is the environmental risk level in Union, Arkansas? ▼
Are there Superfund sites in Union? ▼
How many toxic release facilities are in Union? ▼
What is the air quality in Union? ▼
Is the drinking water safe in Union? ▼
What environmental agencies cover Union? ▼
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.