Clay, MO
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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Clay in Missouri · Population: 255,566
TRI sites such as Ford Motor Company--Kansas City Assembly Plant; American Italian Pasta Co; Polynt Composites USA Inc; SDWIS systems such as LIBERTY PWS; GLADSTONE PWS; KEARNEY PWS; NPL sites such as Armour Road; Lee Chemical anchor Clay, MO's EPA extract. Derived burden score 64/100 (High 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 Clay include EXCELSIOR SPRINGS PWS; SMITHVILLE PWS; CLAY COUNTY PWSD 3, while Ford Motor Company--Kansas City Assembly Plant leads reported TRI pounds among local Form R filers. AQS median AQI 41 / peak 122 in 2024.
Burden score 64/100 (High 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 Clay -- 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 Clay, MO: EPA TRI 2023 reporting year
Same facilities, both years
+23.3%
21 facilities that filed in 2022 and 2023
Whole inventory
+23.3%
1.1 million lb → 1.3 million 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.
- Clay, MO's total reported releases rose from 1.1 million lb in 2022 to 1.3 million lb in 2023, based on EPA TRI filings.
- Clay, MO's land releases rose from 7 lb in 2022 to 374 lb in 2023, based on EPA TRI filings.
- Clay, MO's off-site transfers rose from 34.2 thousand lb in 2022 to 65.8 thousand lb in 2023, based on EPA TRI filings.
- Clay, MO's air releases rose from 1.0 million lb in 2022 to 1.2 million 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 | 280 (78%) | 75 | 4 | 122 |
| 2023 | 228 (65%) | 105 | 16 | 153 |
| 2022 | 286 (78%) | 75 | 4 | 112 |
| 2021 | 270 (77%) | 76 | 4 | 129 |
| 2020 | 287 (79%) | 76 | 1 | 101 |
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 Missouri, see the EPA's AirNow.gov.
Water Systems (19)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| LIBERTY PWS | 30,800 | 0 |
| GLADSTONE PWS | 27,000 | 0 |
| KEARNEY PWS | 11,500 | 0 |
| EXCELSIOR SPRINGS PWS | 11,084 | 2 |
| SMITHVILLE PWS | 10,885 | 4 |
| CLAY COUNTY PWSD 6 | 4,912 | 0 |
| NORTH KANSAS CITY PWS | 4,500 | 0 |
| CLAY COUNTY PWSD 2 | 3,485 | 0 |
| CLAY COUNTY PWSD 3 | 3,447 | 6 |
| CLAY COUNTY PWSD 9 | 2,465 | 0 |
| CLAY COUNTY PWSD 8 | 2,243 | 0 |
| PLATTE COUNTY PWSD 8 | 1,200 | 6 |
| CLAY COUNTY PWSD 5 | 1,191 | 0 |
| CLAY COUNTY PWSD 4 | 1,032 | 0 |
| MISSOURI CITY PWS | 254 | 0 |
| CLAY COUNTY PWSD 7 | 245 | 0 |
| BIRMINGHAM VILLAGE OF PWS | 200 | 0 |
| PRATHERSVILLE PWS | 120 | 0 |
| MOSBY PWS | 93 | 126 |
TRI Facilities (27)
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Armour Road | NPL Site | 50.00 |
| Lee Chemical | NPL Site | 46.81 |
Cities in Clay (12)
Frequently Asked Questions
What is the environmental risk level in Clay, Missouri? ▼
Are there Superfund sites in Clay? ▼
How many toxic release facilities are in Clay? ▼
What is the air quality in Clay? ▼
Is the drinking water safe in Clay? ▼
What environmental agencies cover Clay? ▼
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.