Grant, OK
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 Grant in Oklahoma · Population: 4,137
TRI sites such as Oneok Hydrocarbon L.P. - Medford Fractionator; SDWIS systems such as MEDFORD; POND CREEK; LAMONT anchor Grant, OK's EPA extract. Derived burden score 31/100 (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 Grant include MEDFORD; POND CREEK; LAMONT, while Oneok Hydrocarbon L.P. - Medford Fractionator leads reported TRI pounds among local Form R filers. AQS median AQI 32 / peak 86 in 2024.
Burden score 31/100 (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 Grant -- 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.
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 | 92 (83%) | 19 | 0 | 86 |
| 2023 | 94 (78%) | 26 | 0 | 89 |
| 2022 | 102 (86%) | 17 | 0 | 73 |
| 2021 | 90 (84%) | 17 | 0 | 66 |
| 2020 | 94 (89%) | 12 | 0 | 69 |
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 Oklahoma, see the EPA's AirNow.gov.
Water Systems (10)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| MEDFORD | 1,172 | 4 |
| POND CREEK | 982 | 2 |
| LAMONT | 417 | 8 |
| R&C WATER CORP | 400 | 13 |
| WAKITA | 344 | 13 |
| NASH | 224 | 4 |
| SW WATER INC | 200 | 3 |
| DEER CREEK | 147 | 74 |
| MANCHESTER | 104 | 3 |
| GRANT COUNTY RWD #1 | 100 | 4 |
TRI Facilities (1)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Oneok Hydrocarbon L.P. - Medford Fractionator | 108.5K lbs |
Cities in Grant (7)
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.