---
schema_version: "secwatch.filing_event.v1"
accession: "0000822818-21-000051"
form_type: "8-K"
ticker: "CLH"
cik: "0000822818"
company_name: "CLEAN HARBORS INC"
filed_at: "2021-11-03T23:59:59+00:00"
generated_at: "2026-06-28T14:42:58.420015+00:00"
event_type: "earnings"
sentiment: "positive"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Clean Harbors Q3 revenue up 22% to $951.5M, EPS $1.20, raises FY guidance

## Summary
- Q3 revenue $951.5M (+22% YoY); net income $65.4M ($1.20 EPS), adjusted EPS $1.14.
- Adjusted EBITDA $185.1M (+10% YoY), margin 19.5%; SKSS revenue +60% with record re-refinery spread.
- Environmental Services revenue +15%, incineration utilization 82%; landfill avg price/ton +17%.
- Completed HydroChemPSC acquisition in Oct 2021; raised FY2021 adjusted EBITDA guidance to $655-675M.
- FY2021 adjusted free cash flow guidance raised to $310-330M.

## SEC filing metadata
- accession: 0000822818-21-000051
- form_type: 8-K
- ticker: CLH
- cik: 0000822818
- company_name: CLEAN HARBORS INC
- filed_at: 2021-11-03T23:59:59+00:00
- event_type: earnings
- sentiment: positive
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/822818/000082281821000051/0000822818-21-000051-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/822818/000082281821000051/clh-20211103.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000822818-21-000051
- JSON: https://secwatch.observer/filing/0000822818-21-000051.json
- Plain text: https://secwatch.observer/filing/0000822818-21-000051.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.