Is CLH a Buy? What to Consider in 2026
Last updated July 2026
Short answer
The bull case for Clean Harbors (CLH) rests on Scarce disposal infrastructure and pricing power: Clean Harbors owns a network of RCRA-permitted incinerators and hazardous-waste landfills that are extremely difficult to permit and build new. Revenue (FY2025) is ~$6.03B. If you believe that thesis holds, the real questions become position sizing and overlap, not timing. The main risk to that view: The stock trades at roughly 40x trailing earnings, so it prices in continued execution and leaves little room for disappointment. Whether CLH is a buy comes down to whether you believe the thesis. This is informational, not a recommendation, and Walnut is not an investment adviser.
Clean Harbors operates two segments. Environmental Services (the large majority of revenue and profit) runs hazardous-waste incinerators, landfills, treatment facilities, field and emergency-response services, and the Safety-Kleen branded parts-washer and used-oil collection network. The second segment, Safety-Kleen Sustainability Solutions (SKSS), is North America's largest re-refiner and recycler of used motor oil, turning waste oil into base and blended lubricants. The company's moat comes from owning scarce, hard-to-permit assets: RCRA-permitted high-temperature incinerators and disposal sites that competitors cannot easily replicate, which gives Clean Harbors durable pricing power on the disposal side. The investment picture is one of a high-quality industrial compounder trading at a premium valuation. Full-year 2025 revenue reached a record ~$6.03 billion with net income of ~$391 million, and the company delivered record Q1 2026 revenue while raising full-year adjusted EBITDA guidance. The bull case rests on a long runway of secular tailwinds (tightening environmental regulation, reshoring of industrial activity, and an emerging PFAS destruction market where Clean Harbors is a technology leader). The counterweight is the ~40x earnings multiple, exposure to industrial and energy cycles, and the more volatile, oil-price-sensitive SKSS segment.
What's the case for buying CLH?
1. Scarce disposal infrastructure and pricing power
Clean Harbors owns a network of RCRA-permitted incinerators and hazardous-waste landfills that are extremely difficult to permit and build new. This scarcity underpins consistent annual price increases on the disposal side and structurally supports Environmental Services margins, the segment that drives most of the company's profit.
2. New incinerator capacity and utilization
The Kimball, Nebraska incinerator adds meaningful high-margin disposal capacity as it ramps toward full utilization. Incremental incineration volumes flow through at strong margins, so rising utilization is a core lever for adjusted EBITDA growth over the next several years.
3. PFAS destruction opportunity
Clean Harbors has positioned itself as a leader in destroying PFAS (so-called forever chemicals) via high-temperature incineration, with study results the company says surpass EPA standards. As federal and corporate PFAS rules tighten, this could become a multi-year revenue and margin tailwind, with management describing a rapidly growing services pipeline.
4. Recurring revenue and reshoring tailwinds
A large share of revenue is recurring, tied to ongoing industrial production, maintenance turnarounds, and regulated waste generation. Reshoring of US manufacturing and continued industrial activity expand the base of waste that must be managed, supporting the Environmental Services growth trajectory.
What are the risks to CLH?
The stock trades at roughly 40x trailing earnings, so it prices in continued execution and leaves little room for disappointment. The SKSS segment is sensitive to base and blended oil pricing, which pressured results in early 2026 and adds cyclicality. Environmental Services demand is tied to industrial production and energy activity, so a manufacturing or energy slowdown would reduce waste volumes and emergency-response work. The business is capital intensive and carries meaningful debt from acquisitions, and it faces ongoing regulatory, environmental-liability, and permitting risk. PFAS revenue, while promising, is still early and depends on the pace and shape of future regulation.
How is CLH valued? (as of July 2026)
Snapshot for CLH as of July 2026, sourced from Yahoo Finance and may be delayed. Valuation figures move with price and earnings; verify the current numbers with your broker before deciding.
- Revenue (FY2025): ~$6.03B
- Revenue (TTM): ~$6.06B
- Net income (FY2025): ~$391M
- Diluted EPS (FY2025): ~$7.28
- Market cap: ~$16.4B
- Trailing P/E: ~42x
- 2026 adj. EBITDA guidance: ~$1.24B to $1.30B
Clean Harbors posted record 2025 revenue of ~$6.03 billion and record Q1 2026 revenue of ~$1.46 billion, then raised full-year 2026 adjusted EBITDA guidance to roughly $1.24 to $1.30 billion and free cash flow to about $490 to $550 million. At roughly 40x trailing earnings and a mid-30s forward multiple, the stock is valued as a premium industrial compounder rather than a value name. Analyst price targets in mid-2026 clustered close to the trading price, implying the market already reflects much of the near-term growth.
How do you decide if CLH is a buy?
Rather than asking whether CLH is a buy in the abstract, it tends to help to answer four questions:
- Thesis: do you believe the case above, and is it still true today?
- Time horizon: a single stock can be volatile, so a longer horizon absorbs more of the swings.
- Position sizing: a thesis can be right and the sizing still wrong; decide how much of your portfolio one name should be.
- Overlap: check whether you already hold CLH indirectly through an index or sector ETF before adding more.
For the full picture, see the CLH stock guide (what the company does, the ETFs that hold it, similar stocks, and the themes it fits). In Walnut you can ask its AI about CLH against your real portfolio and see your actual exposure before deciding.
The bottom line on CLH
The bottom line: Clean Harbors's story right now is Scarce disposal infrastructure and pricing power, with revenue (fy2025) at ~$6.03B. If you believe that narrative continues, the call is about sizing CLH sensibly and checking overlap with what you own; if you doubt it (the risk: the stock trades at roughly 40x trailing earnings, so it prices in continued execution and leaves little room for disappointment.), it is not for you. Decide from the thesis, not the ticker. Walnut is not an investment adviser.
Build a basket around CLH with Walnut
Use Clean Harbors as one constituent in a thematic basket Walnut's AI helps you assemble. Describe a thesis you believe in, the AI proposes the holdings and weights, and you approve before any broker order.
FAQ
Is CLH a good stock to buy right now?
+
The case for Clean Harbors right now is Scarce disposal infrastructure and pricing power, with revenue (fy2025) at ~$6.03B. If you believe that thesis holds, CLH is a way to own it and the real questions are sizing and overlap, not timing; the main risk to that view is the stock trades at roughly 40x trailing earnings, so it prices in continued execution and leaves little room for disappointment. So it comes down to whether you believe the thesis. Walnut is not an investment adviser and this is not a recommendation.
What does Clean Harbors do?
+
Clean Harbors operates two segments.
What are the main risks of CLH?
+
The stock trades at roughly 40x trailing earnings, so it prices in continued execution and leaves little room for disappointment. The SKSS segment is sensitive to base and blended oil pricing, which pressured results in early 2026 and adds cyclicality. Environmental Services demand is tied to industrial production and energy activity, so a manufacturing or energy slowdown would reduce waste volumes and emergency-response work. The business is capital intensive and carries meaningful debt from acquisitions, and it faces ongoing regulatory, environmental-liability, and permitting risk. PFAS revenue, while promising, is still early and depends on the pace and shape of future regulation.
What does Clean Harbors do?
+
Clean Harbors is North America's largest provider of hazardous-waste and environmental services. It runs incinerators, landfills, treatment facilities, field and emergency-response services, and, through Safety-Kleen, the largest used-oil recycling and re-refining network on the continent.
What are Clean Harbors' two business segments?
+
Environmental Services (ES), which includes technical services, Safety-Kleen environmental services, and field services, generates most of the revenue and profit. Safety-Kleen Sustainability Solutions (SKSS) collects and re-refines used oil into base and blended lubricants.
How big is Clean Harbors?
+
The company reported record revenue of about $6.03 billion for full-year 2025 and carried a market capitalization of roughly $16.4 billion in mid-2026. It is the dominant player in North American hazardous-waste disposal.
Why does Clean Harbors trade at a high valuation?
+
As of July 2026 the stock traded at roughly 40x trailing earnings. Investors assign a premium multiple because it owns scarce, hard-to-permit disposal assets with durable pricing power and has secular tailwinds from tightening environmental regulation.
Walnut is informational and is not an investment adviser. This page is educational and not a recommendation to buy or sell CLH; figures are approximate and dated, and your own situation, time horizon, and risk tolerance should drive any decision. Verify current data before investing.