Clark, WA
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 Clark in Washington · Population: 510,516
TRI sites such as Seh America Inc; Tsmc Washington LLC; Analog Devices/camas Site; SDWIS systems such as CAMAS MUNICIPAL WATER SEWER SYSTEM; BATTLE GROUND WATER DEPT CITY OF; RIDGEFIELD PUBLIC WORKS; NPL sites such as ALCOA (Vancouver Smelter); Bonneville Power Administration Ross Complex (USDOE); Boomsnub/Airco anchor Clark, WA's EPA extract. Derived burden score 74/100 (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 Clark include PINE COVE RV PARK; SUNRIDGE WATER INC; PINE RIDGE MHP (SC3260157), while Seh America Inc leads reported TRI pounds among local Form R filers. AQS median AQI 31 / peak 105 in 2024.
Burden score 74/100 (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 Clark -- 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 Clark, WA: EPA TRI 2023 reporting year
Same facilities, both years
+5.0%
19 facilities that filed in 2022 and 2023
Whole inventory
+5.0%
159.1 thousand lb → 167.2 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.
- Clark, WA's total reported releases rose from 159.1 thousand lb in 2022 to 167.1 thousand lb in 2023, based on EPA TRI filings.
- Clark, WA's off-site transfers rose from 134.0 thousand lb in 2022 to 141.2 thousand lb in 2023, based on EPA TRI filings.
- Clark, WA's air releases rose from 25.1 thousand lb in 2022 to 25.9 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 | 321 (88%) | 44 | 1 | 105 |
| 2023 | 281 (77%) | 82 | 0 | 153 |
| 2022 | 267 (73%) | 93 | 2 | 175 |
| 2021 | 308 (84%) | 57 | 0 | 98 |
| 2020 | 272 (74%) | 85 | 1 | 874 |
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 Washington, see the EPA's AirNow.gov.
Water Systems (21)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CAMAS MUNICIPAL WATER SEWER SYSTEM | 31,794 | 0 |
| BATTLE GROUND WATER DEPT CITY OF | 30,237 | 0 |
| RIDGEFIELD PUBLIC WORKS | 21,225 | 0 |
| LARCH CORRECTIONS CENTER | 705 | 0 |
| MCHUGH MOBILE HOME PARK | 490 | 0 |
| VISTA DEL RIO MOBILE HOME PARK | 352 | 0 |
| SILVER SPUR RV PARK LLC | 275 | 0 |
| GREAT WESTERN MOBILE HOME PARK | 250 | 0 |
| PINE COVE RV PARK | 223 | 1 |
| OAK MEADOWS MOBILE HOME PARK | 216 | 0 |
| SUNRIDGE WATER INC | 200 | 2 |
| FIR GROVE MOBILE COURT | 114 | 0 |
| PINE RIDGE MHP (SC3260157) | 100 | 2 |
| HILLCREST MANOR | 100 | 0 |
| LeNets Mobile Estates | 95 | 0 |
| SINGLE TREE ACRES | 90 | 0 |
| QUAIL HOLLOW MOBILE HOME PARK | 78 | 1 |
| PARKSIDE AIRPARK OWNERS | 66 | 0 |
| COTTONWOOD MHP | 60 | 0 |
| OLDS MOBILE PARK | 60 | 1 |
| SUNSET MOBILE HOME PARK | 45 | 0 |
TRI Facilities (23)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Seh America Inc | 425.5K lbs |
| 2 | Tsmc Washington LLC | 83.5K lbs |
| 3 | Analog Devices/camas Site | 73.2K lbs |
| 4 | Church & Dwight Co. Inc. Vancouver Facility | 55.1K lbs |
| 5 | Fiber Glass Systems LP - Ridgefield Facility | 48.7K lbs |
| 6 | Exterior Wood Inc | 8.2K lbs |
| 7 | Glacier Northwest Inc West Batch Plant | 8.2K lbs |
| 8 | Tesoro - Vancouver Wa Terminal | 5.8K lbs |
| 9 | Pendleton Woolen Mills | 5.0K lbs |
| 10 | Glacier Northwest Inc East Vancouver Ready-Mix Plant | 870 lbs |
| 11 | Allweather Wood LLC | 833 lbs |
| 12 | Christensen Shipyards LLC | 399 lbs |
| 13 | Columbia Machine Inc | 61 lbs |
| 14 | Fabricated Products Inc DBA Seafab Metals Co | 35 lbs |
| 15 | Georgia-Pacific Consumer Operations LLC | 19 lbs |
| 16 | Simonds International | 5 lbs |
| 17 | Hydro Extrusion Portland Inc - Port of Vancouver Plant | 3 lbs |
| 18 | Silicon Forest Electronics Inc. | 0 lbs |
| 19 | Frito-Lay Inc. | 0 lbs |
| 20 | Nalco Co | 0 lbs |
| 21 | US Water Services | 0 lbs |
| 22 | Kemira Water Solutions Inc. | 0 lbs |
| 23 | Controltek Inc. | 0 lbs |
Superfund Sites (7)
| Site Name | Status | HRS Score |
|---|---|---|
| ALCOA (Vancouver Smelter) | Deleted NPL Site | 57.80 |
| Bonneville Power Administration Ross Complex (USDOE) | Deleted NPL Site | 53.67 |
| Boomsnub/Airco | NPL Site | 0.00 |
| Frontier Hard Chrome, Inc. | Deleted NPL Site | 57.93 |
| Toftdahl Drums | Deleted NPL Site | 40.22 |
| Vancouver Water Station #1 Contamination | Deleted NPL Site | 50.00 |
| Vancouver Water Station #4 Contamination | Deleted NPL Site | 50.00 |
Cities in Clark (8)
Frequently Asked Questions
What is the environmental risk level in Clark, Washington? ▼
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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.