Clark, WA
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Clark in Washington · Population: 510,516
Clark, WA is tracked across three EPA datasets covering 23 Toxics Release Inventory (TRI) facilities, 20 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 46/100 (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 715.4K lbs of reported toxic releases under EPCRA Section 313, while 4 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 31 and a peak AQI of 105 in 2024, with 88% 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 | 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 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 (20)
| System | Population | Violations |
|---|---|---|
| CAMAS MUNICIPAL WATER SEWER SYSTEM | 31,794 | 0 |
| BATTLE GROUND WATER DEPT CITY OF | 29,974 | 0 |
| RIDGEFIELD PUBLIC WORKS | 20,967 | 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 | 1 |
| FIR GROVE MOBILE COURT | 114 | 0 |
| PINE RIDGE MHP (SC3260157) | 100 | 1 |
| 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 |
| 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 | 21 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 |
Cities in Clark (5)
Frequently Asked Questions
What is the environmental risk level in Clark, Washington? ▼
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How many toxic release facilities are in Clark? ▼
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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.