Brown, SD
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 Brown in South Dakota · Population: 38,079
TRI sites such as Ag Processing Inc; New Angus LLC; Poet Holding Co LLC; SDWIS systems such as ABERDEEN; GROTON; MINA LAKE SANITARY DISTRICT anchor Brown, SD's EPA extract. Derived burden score 41/100 (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 Brown include ABERDEEN; MINA LAKE SANITARY DISTRICT; PRAIRIEWOOD PROPERTY OWNERS, while Ag Processing Inc leads reported TRI pounds among local Form R filers. AQS median AQI 24 / peak 118 in 2024.
Burden score 41/100 (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 Brown -- 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 Brown, SD: EPA TRI 2023 reporting year
Same facilities, both years
+91.5%
6 facilities that filed in 2022 and 2023
Whole inventory
+91.5%
381.8 thousand lb → 731.3 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Brown, SD's total reported releases rose from 381.8 thousand lb in 2022 to 731.3 thousand lb in 2023, based on EPA TRI filings.
- Brown, SD's off-site transfers rose from 7.3 thousand lb in 2022 to 341.3 thousand lb in 2023, based on EPA TRI filings.
- Brown, SD's air releases rose from 374.5 thousand lb in 2022 to 390.0 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 | 306 (86%) | 47 | 4 | 118 |
| 2023 | 289 (79%) | 68 | 7 | 166 |
| 2022 | 325 (93%) | 25 | 0 | 93 |
| 2021 | 301 (85%) | 52 | 0 | 208 |
| 2020 | 308 (85%) | 56 | 0 | 78 |
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 Dakota, see the EPA's AirNow.gov.
Water Systems (19)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ABERDEEN | 27,989 | 17 |
| GROTON | 1,380 | 0 |
| MINA LAKE SANITARY DISTRICT | 863 | 3 |
| WARNER | 485 | 0 |
| COUNTRY VILLAGE PARK | 340 | 0 |
| PRAIRIEWOOD PROPERTY OWNERS | 300 | 4 |
| FREDERICK | 215 | 1 |
| HECLA | 200 | 3 |
| JOBEE ACRES | 108 | 2 |
| PLEASANT VALLEY ESTATES | 105 | 4 |
| LONG LAKE COLONY | 100 | 0 |
| HUTTERVILLE COLONY SOUTH DAKOTA INC | 90 | 1 |
| NORTHWOOD FIRST SUBDIVISION | 90 | 0 |
| WESTPORT SANITARY DISTRICT | 88 | 2 |
| ROLLING MEADOWS | 83 | 1 |
| THE MEADOWS | 80 | 0 |
| RICHMOND HEIGHTS HOMEOWNERS ASSOCIAT | 67 | 0 |
| STRATFORD | 57 | 3 |
| GREEN ACRES ASSOCIATION | 55 | 0 |
TRI Facilities (8)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Ag Processing Inc | 1.3M lbs |
| 2 | New Angus LLC | 836.6K lbs |
| 3 | Poet Holding Co LLC | 104.0K lbs |
| 4 | Hub City Energy LLC | 59.9K lbs |
| 5 | Twin City Fan Cos Aberdeen | 11 lbs |
| 6 | Hub City Inc | 0 lbs |
| 7 | Gcc-Aberdeen | 0 lbs |
| 8 | 3M Co | 0 lbs |
Cities in Brown (8)
Frequently Asked Questions
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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.