Lewis, 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 Lewis in Washington · Population: 83,925
TRI sites such as Transalta Centralia Generation / Mining; Darigold - Chehalis; Sierra Pacific Industries- Centralia; SDWIS systems such as CENTRALIA PUBLIC WORKS - WATER; CHEHALIS WATER DEPARTMENT; WINLOCK CITY OF; NPL sites such as American Crossarm & Conduit Co.; Centralia Municipal Landfill; Hamilton/Labree Roads Ground Water Contamination anchor Lewis, WA's EPA extract. Derived burden score 55/100 (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 Lewis include VADER-ENCHANTED VALLEY; PE ELL TOWN OF; Lewis Co Water Sewer Dist #6, while Transalta Centralia Generation / Mining leads reported TRI pounds among local Form R filers. AQS median AQI 22 / peak 129 in 2024.
Burden score 55/100 (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 Lewis -- 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 Lewis, WA: EPA TRI 2023 reporting year
Same facilities, both years
-2.6%
8 facilities that filed in 2022 and 2023
Whole inventory
-2.6%
132.0 thousand lb → 128.6 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.
- Lewis, WA's total reported releases fell from 132.0 thousand lb in 2022 to 128.6 thousand lb in 2023, based on EPA TRI filings.
- Lewis, WA's land releases fell from 16.8 thousand lb in 2022 to 8.5 thousand lb in 2023, based on EPA TRI filings.
- Lewis, WA's off-site transfers rose from 15.4 thousand lb in 2022 to 20.1 thousand lb in 2023, based on EPA TRI filings.
- Lewis, WA's air releases rose from 27.8 thousand lb in 2022 to 31.6 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 | 336 (93%) | 23 | 1 | 129 |
| 2023 | 314 (87%) | 46 | 1 | 159 |
| 2022 | 285 (78%) | 70 | 7 | 198 |
| 2021 | 328 (94%) | 22 | 0 | 71 |
| 2020 | 314 (94%) | 20 | 0 | 258 |
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 (56)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| CENTRALIA PUBLIC WORKS - WATER | 28,164 | 0 |
| CHEHALIS WATER DEPARTMENT | 11,718 | 0 |
| WINLOCK CITY OF | 3,502 | 0 |
| NAPAVINE CITY OF | 3,095 | 0 |
| MORTON CITY OF | 2,147 | 0 |
| LEWIS CO WATER DIST #2 | 1,983 | 0 |
| TOLEDO MUNICIPAL | 1,944 | 0 |
| MOSSYROCK PUBLIC UTILITY CITY OF | 1,553 | 0 |
| HIGH VALLEY COUNTRY CLUB | 1,425 | 0 |
| LEWIS CO WATER DIST #1 | 1,174 | 0 |
| VADER-ENCHANTED VALLEY | 985 | 4 |
| PE ELL TOWN OF | 859 | 9 |
| Lewis Co Water Sewer Dist #6 | 740 | 1 |
| LEWIS CO WATER DIST #3 | 611 | 0 |
| NEWAUKUM HILL WATER ASSN | 493 | 0 |
| Maple Lane Behavioral Health | 450 | 0 |
| CARROLLS WATER ASSN | 449 | 6 |
| PLEASANT FOREST CAMPING CLUB | 327 | 0 |
| NEWAUKUM VENTURES | 186 | 0 |
| MALONE | 181 | 0 |
| FLYING CARPET MOBILE ESTATES | 174 | 0 |
| WILDAIRE ESTATES | 146 | 13 |
| MIDDLE FORK WATER & SEWER | 144 | 0 |
| VIEW RANCH ESTATES WATER ASSN | 141 | 0 |
| WHISPERING WOODS HOME PARK | 125 | 0 |
| TIMBERLANE MOBILE ESTATES | 120 | 0 |
| PARKWOOD MOBILE HOME ESTATES | 105 | 0 |
| REDMON MOBILE HOME PARK | 105 | 0 |
| SALKUM WATER SUPPLY | 103 | 1 |
| LAKESIDE VILLAGE | 94 | 0 |
| SKOOKUMCHUCK MOBILE MANOR | 90 | 0 |
| LAKE MAYFIELD COMMUNITY CLUB | 88 | 0 |
| MAYFIELD KAMPER KLUB | 87 | 2 |
| HARMONY PARK LOT OWNERS | 81 | 0 |
| PATTERSON LAKE WATER | 79 | 0 |
| FROST ROAD PARK | 65 | 0 |
| TIMBERLANE MOBILE HOME PARK | 63 | 2 |
| WAYSIDE VILLAGE | 60 | 0 |
| Elbe Water & Sewer District | 60 | 0 |
| TOWNSHIP PLACE | 56 | 0 |
| PRAIRIE VILLAGE LLC | 55 | 0 |
| GUNDERSON WATER WORKS | 53 | 0 |
| Cowlitz Indian Tribal Housing | 52 | 0 |
| RIVER OAKS RV PARK & CAMPGROUND | 50 | 0 |
| WINSTON CREEK RV PARK | 50 | 0 |
| COLUMBIA CREST ESTATES | 48 | 44 |
| CASCADE MHP | 48 | 0 |
| SILVERBROOK MH & RV | 42 | 0 |
| LAKEVIEW TERRACE | 41 | 0 |
| TILTON RIVER MOBILE HOME PARK | 40 | 0 |
| SKATE CREEK TERRACE ASSOCIATION | 39 | 0 |
| GRAND MOUND MOTEL | 36 | 0 |
| CEDAR VILLA | 32 | 0 |
| JACKSON MOBILE 2 | 30 | 0 |
| WINLOCK WATERS 2 | 25 | 0 |
| MEADOWS | 24 | 0 |
TRI Facilities (9)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Transalta Centralia Generation / Mining | 590.9K lbs |
| 2 | Darigold - Chehalis | 95.1K lbs |
| 3 | Sierra Pacific Industries- Centralia | 35.2K lbs |
| 4 | Imperial Group Manufacturing | 2.2K lbs |
| 5 | National Frozen Foods Corp-Processing | 770 lbs |
| 6 | Glacier Northwest Inc Chehalis Plant | 11 lbs |
| 7 | Truck Accessories Group LLC DBA Pace Edwards | 2 lbs |
| 8 | Aladdin Manufacturing Carpet Cushion - Chehalis Wa | 0 lbs |
| 9 | Perdue Foods LLC - Chehalis Feedmill | 0 lbs |
Superfund Sites (3)
| Site Name | Status | HRS Score |
|---|---|---|
| American Crossarm & Conduit Co. | Deleted NPL Site | 30.44 |
| Centralia Municipal Landfill | NPL Site | 36.36 |
| Hamilton/Labree Roads Ground Water Contamination | NPL Site | 37.65 |
Cities in Lewis (13)
Frequently Asked Questions
What is the environmental risk level in Lewis, Washington? ▼
Are there Superfund sites in Lewis? ▼
How many toxic release facilities are in Lewis? ▼
What is the air quality in Lewis? ▼
Is the drinking water safe in Lewis? ▼
What environmental agencies cover Lewis? ▼
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.