What does Clean Harbors do?
Clean Harbors, Inc. is a New York Stock Exchange-listed environmental and industrial services company trading under CLH. It collects difficult waste, transports it through a regulated network, treats or recycles it, and manages materials industrial customers cannot safely handle themselves. Services include hazardous-waste disposal, industrial cleaning, emergency response, parts washers, used-oil collection, and re-refined lubricants. The company’s official investor overview describes a customer base spanning chemical, manufacturing, refining, automotive, and government markets.
Who buys these services?
Customers buy compliance, availability, and accountability. A refinery outage, laboratory cleanout, chemical spill, or PFAS job can create regulatory and safety exposure that makes the cheapest vendor a poor choice. Clean Harbors sells a documented chain of custody from trained labor and transport through final treatment or disposal, allowing customers to consolidate difficult waste streams with one provider.
How broad is the operating footprint?
| Identity item | Officially reported position | Analytical implication |
|---|---|---|
| Listing | NYSE: CLH | One common equity security supports a conventional public-company valuation framework. |
| Core geography | United States and Canada; additional operations in Mexico, Puerto Rico, and India | North America drives economics, while the wider footprint supports service delivery and shared functions. |
| Reportable segments | Environmental Services and Safety-Kleen Sustainability Solutions | The first is infrastructure- and service-led; the second is more exposed to oil-product spreads. |
| FY2025 geography | $5.49B United States; $540.0M Canada | About 91% of revenue was U.S.-generated, concentrating both demand and regulation. |
How does Clean Harbors make money?
The model combines service fees with product sales. Service revenue covers collection, transport, onsite labor, treatment, recycling, and disposal; product revenue includes re-refined base oil, lubricants, recycled fuel oil, and vacuum gas oil. Scarce disposal assets can support pricing and operating leverage, while oil products remain sensitive to prices, feedstock costs, and lubricant demand.
| Revenue source | Q1 2026 revenue | How the economics work |
|---|---|---|
| Technical Services | $448.3M | Fees for packaging, transport, treatment, incineration, recycling, landfill disposal, and project work. |
| Safety-Kleen Environmental Services | $338.2M | Recurring route-based services such as containerized waste, vacuum service, and parts washers. |
| Industrial Services and Other | $302.6M | Labor- and equipment-intensive plant cleaning, maintenance, turnarounds, and specialty industrial work. |
| Field and Emergency Response | $231.4M | Planned remediation plus event-driven spill, disaster, and emergency assignments. |
| Safety-Kleen Oil | $139.1M | Used oil is collected and re-refined into products whose prices and margins move with market spreads. |
Which segment contributes most?
Why is SKSS economically different?
SKSS is not simply a recycler. It can charge generators to collect used oil, then convert that feedstock into saleable products. Profitability therefore depends on both sides of the spread. In FY2025, lower base-oil and blended-oil revenue pressured the segment, while stronger collection pricing and specialty products provided offsets.
How did Clean Harbors become strategically important?
Clean Harbors’ history is a sequence of capability additions. Since 1980, acquisitions have expanded its regulated disposal network, route density, industrial scope, and circular-oil platform. Its official history shows how acquisitions transformed a local hazardous-waste business into an integrated North American system.
Which turning points still shape the company?
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1980Alan McKim founded Clean Harbors. Hazardous-material handling established the safety and compliance culture that still matters commercially.
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2002–2003The company acquired Safety-Kleen’s Chemical Services assets, materially expanding treatment, storage, and disposal infrastructure.
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2012Safety-Kleen added roughly 4,200 employees and more than 200,000 customer locations, creating today’s used-oil and route-service platform.
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2018Veolia’s U.S. industrial cleaning business added scale and geographic reach in plant maintenance and industrial services.
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2021HydroChemPSC deepened specialty industrial cleaning and maintenance; the business was later rebranded HPC Industrial.
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2024HEPACO added about 1,000 employees, 40 locations, and more than 900 vehicles, strengthening field response as Kimball began its ramp.
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2026Depot Connect assets added two permitted treatment facilities for $131.8M, while the $225M Terra Nova transaction added five Carolinas sites and recurring treatment capacity.
What does Clean Harbors’ latest quarter show?
The latest completed reporting period available before the scheduled July 29, 2026 second-quarter release is the quarter ended March 31, 2026. Clean Harbors reported its highest first-quarter revenue and raised full-year guidance. The key signal was better segment profitability despite weather, planned incinerator maintenance, and weakness in Industrial Services.
How did the income statement change?
| Metric | Q1 2026 | Q1 2025 | Interpretation |
|---|---|---|---|
| Revenue | $1,459.5M | $1,432.0M | Modest growth, led by Environmental Services. |
| Operating income | $118.9M | $111.6M | Up 6.6%, faster than revenue. |
| Net income | $63.2M | $58.7M | Up 7.7%; net margin was approximately 4.3%. |
| Environmental Services direct revenue | $1,252.5M | $1,209.1M | Up 3.6%; segment adjusted EBITDA rose to $290.4M. |
| SKSS direct revenue | $207.0M | $222.7M | Down 7.1%, but segment adjusted EBITDA increased 16.7% to $33.0M. |
These figures come from the official Q1 2026 earnings release and Form 10-Q.
What drove the quarter?
Permitted disposal capacity and route density define the moat
Clean Harbors’ strongest resources are permits, physical capacity, transportation density, operating know-how, and customer trust. A new hazardous-waste incinerator or landfill requires heavy capital, technical expertise, community acceptance, and lengthy approvals. Those barriers constrain supply and make dependable capacity valuable when industrial activity, remediation, or regulation increases waste volumes.
How scarce is the infrastructure?
Who are the main competitors?
| Competitor set | Where rivalry appears | Clean Harbors distinction |
|---|---|---|
| Veolia North America and Enviri | Hazardous waste, industrial services, treatment, and incineration | Clean Harbors combines disposal assets with branches, field response, and Safety-Kleen routes. |
| Republic Services, Waste Management, and GFL | Industrial and environmental waste services | CLH is more concentrated in complex hazardous and industrial streams than broad municipal solid-waste networks. |
| Crystal Clean and regional operators | Used oil, parts washers, and local environmental services | Safety-Kleen’s route network and re-refining scale create collection and downstream-product integration. |
| EQT-owned assets and Ross Incineration | Commercial hazardous-waste incineration | CLH can route volumes across a broader internal network and sell adjacent services to the same customer. |
The filing says no single competitor matches the full suite. Rivalry remains because customers can unbundle work and local firms can compete on price. The moat is strongest when a job needs both a scarce permitted outlet and dependable multi-site execution.
How financially strong is Clean Harbors?
Clean Harbors is profitable and cash-generative, but also capital-intensive and leveraged. FY2025 produced $6.03B of revenue, $1.17B of adjusted EBITDA, $866.7M of operating cash flow, and $509.3M of company-defined adjusted free cash flow. Environmental Services increasingly carried the profit pool.
Why was first-quarter cash flow negative?
The first quarter is not a clean annual run-rate because receivables and other working-capital balances build early in the year. Full-year conversion matters more. Management raised 2026 adjusted free cash flow guidance to $490M–$550M and adjusted EBITDA guidance to $1.24B–$1.30B.
How much liquidity and reinvestment capacity does it have?
| Capital item | Latest disclosed amount | What it means |
|---|---|---|
| Cash plus short-term securities | $669.0M at March 31, 2026 | Provides acquisition and project flexibility, but fell after the DCI purchase and seasonal cash use. |
| Long-term debt at par | $2.79B at March 31, 2026 | Meaningful leverage makes interest, refinancing, and disciplined M&A relevant. |
| Revolver availability | $454.7M at March 31, 2026 | No revolver borrowing was outstanding; $145.3M of letters of credit reduced availability. |
| 2026 net capital-spending plan | $460M–$520M | Reflects maintenance needs plus growth projects such as the East Chicago SDA unit and fleet expansion. |
| Environmental liabilities | $229.5M at March 31, 2026 | Closure, post-closure, and remediation obligations are long-dated but economically real. |
| Share repurchases | $25.0M in Q1 2026 | After a $350M authorization expansion, $574.4M remained available. |
Which KPIs best explain Clean Harbors’ performance?
Revenue alone misses the mechanics. Facility utilization, disposal volume, route economics, oil collection, safety, margins, and cash conversion show whether growth creates durable profit or merely adds labor, fuel, and capital needs.
What should researchers monitor each quarter?
Who owns Clean Harbors stock, and how is it governed?
Clean Harbors has one-share-one-vote common stock. Ownership is institutionally concentrated but not controlled by one shareholder; the founder retained a meaningful minority stake at the 2026 proxy date. Board oversight, incentives, and capital-allocation credibility therefore matter.
| Holder or group | Shares | Stake | Why it matters |
|---|---|---|---|
| Wellington Management Group | 5,182,538 | 9.7% | Largest disclosed holder in the April 2026 proxy. |
| The Vanguard Group | 4,779,072 | 9.0% | Large passive ownership raises the importance of standard governance and long-run execution. |
| BlackRock | 4,393,479 | 8.2% | Another major institutional block, but not a controlling shareholder. |
| Alan S. McKim | 2,265,223 | 4.2% | Founder economics remained meaningful at March 23, 2026 even without majority control. |
| Directors and executive officers as a group | 2,670,075 | 5.0% | Creates alignment, while dispersed outside ownership preserves institutional influence. |
The ownership figures and 53,313,462 shares outstanding on the March 23, 2026 record date are reported in the 2026 definitive proxy statement.
What changed in leadership and incentives?
The July 16, 2026 chairman announcement completes a generational transition. Compensation design also matters: 2026 performance awards are tied equally to 2027 adjusted EBITDA and adjusted EBITDA margin, encouraging both scale and quality. Earlier awards included return on invested capital, a useful counterweight to acquisition-driven growth.
What opportunities could expand the Clean Harbors story?
Growth is tied to regulation and industrial complexity. Manufacturing, stricter waste standards, PFAS remediation, aging infrastructure, and emergency events can feed the same scarce network. The test is whether Clean Harbors captures that demand without overpaying for acquisitions or diluting returns.
Which growth vectors are most material?
What risks could change Clean Harbors’ outlook?
The assets that create barriers also create liabilities. Clean Harbors handles dangerous materials, carries debt, and depends on permits. Incidents, poor acquisitions, spread reversals, or low utilization can hit cash flow sharply.
Where do the most important risks reach the financial statements?
| Risk channel | Current factual anchor | Financial line to monitor |
|---|---|---|
| Safety or environmental incident | TRIR was 0.39 in Q1 2026, but hazardous operations remain inherently exposed. | Insurance, remediation expense, legal reserves, facility downtime, and customer retention. |
| Environmental obligations | $229.5M of recorded environmental liabilities at March 31, 2026. | Cash expenditures, accretion, estimate revisions, and letters of credit. |
| Oil-price and spread volatility | SKSS direct revenue fell 7.1% in Q1 2026 while margin improved. | Base-oil selling price, used-oil acquisition cost, collection pricing, and product mix. |
| Fixed-cost utilization | Incinerator utilization was 80% in Q1 2026. | Technical Services margin, maintenance expense, and Kimball ramp economics. |
| Acquisition and goodwill risk | Goodwill was $1.56B at March 31, 2026; DCI cost $131.8M and Terra Nova $225M. | Integration costs, synergy delivery, return on invested capital, and impairment risk. |
| Leverage and interest | Debt at par was $2.79B at March 31, 2026. | Net interest expense, refinancing rates, covenant headroom, and acquisition capacity. |
| Cybersecurity and workforce | The network depends on dispatch, compliance records, billing, and specialist labor. | Service continuity, SG&A, labor productivity, and customer confidence. |
Why does Clean Harbors matter for valuation, and what should investors watch?
Valuation should separate the durable Environmental Services economics from the more cyclical SKSS spreads. It should also distinguish maintenance capital from strategic projects because management’s adjusted free cash flow excludes selected growth investments. A disciplined DCF tests segment growth, margins, and cash conversion after capital spending, working capital, taxes, interest, and environmental payments.
Which variables should drive a DCF or comparable-company analysis?
Broad solid-waste peers are imperfect because municipal routes differ from CLH’s hazardous and industrial exposure; environmental-services and maintenance peers are incomplete too. Segment-aware valuation and normalized cash flow are more informative than one headline multiple.
What should be monitored next?
The next phase is converting capacity, regulatory demand, and acquisitions into cash returns. Judge DCI and Terra Nova by throughput, cross-selling, and return on invested capital—not added revenue alone.
What is the key takeaway from Clean Harbors analysis?
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