Clean HarborsCLH +1.11%87 Altman Z2-Score is 3.67 as of Jun. 25, 2026, which is 25% above its 10-year median of 2.94. GuruFocus rates CLH with a GF Score™ of 87/100 and a GF Value™ of $243.43 (Modestly Overvalued). The stock has 7 warning signs investors should review. Among 246 Waste Management companies, Clean Harbors ranks better than 64.63% on this metric.
Altman Z2-Score, also known as Z"-Score, is used to predict the likelihood that a non-manufacturing company (excluding property/financial company) will face bankruptcy within a two-year period.
Good Sign:
Clean Harbors has a Altman Z2-Score of 3.67, indicating it is in Safe Zones. This implies the Altman Z2-Score is strong.
The zones of discrimination were as such:
When Altman Z2-Score <= 1.1, it is in Distress Zones.
When Altman Z2-Score >= 2.6, it is in Safe Zones.
When Altman Z2-Score is between 1.1 and 2.6, it is in Grey Zones.
The historical rank and industry rank for Clean Harbors's Altman Z2-Score or its related term are showing as below:
CLH'
s Altman Z2-Score Range Over the Past 10 Years
Min: 2.02 Med: 2.94 Max: 3.71
Current: 3.67
During the past 13 years, Clean Harbors's highest Altman Z2-Score was 3.71. The lowest was 2.02. And the median was 2.94.
The original Z-Score model was based on publicly traded manufacturing companies while the Z2-Score, also known as Z"-score can be used for any type of company excluding property/financial companies. Both Z-Score and Z2-Score describes the financial health of a company, and its likelihood of financial distress.
X1: The Working Capital/Total Assets (WC/TA) ratio is a measure of the net liquid assets of the firm relative to the total capitalization. Working capital is defined as the difference between current assets and current liabilities. Ordinarily, a firm experiencing consistent operating losses will have shrinking current assets in relation to total assets. Altman found this one proved to be the most valuable liquidity ratio comparing with the current ratio and the quick ratio. This is however the least significant of the five factors.
X2: Retained Earnings/Total Assets: the RE/TA ratio measures the leverage of a firm. Retained earnings is the account which reports the total amount of reinvested earnings and/or losses of a firm over its entire life. Those firms with high RE, relative to TA, have financed their assets through retention of profits and have not utilized as much debt.
X3, Earnings Before Interest and Taxes/Total Assets (EBIT/TA): This ratio is a measure of the true productivity of the firm's assets, independent of any tax or leverage factors. Since a firm's ultimate existence is based on the earning power of its assets, this ratio appears to be particularly appropriate for studies dealing with corporate failure. This ratio continually outperforms other profitability measures, including cash flow.
Altman Z2-Score does not apply to financial companies.
Clean Harbors Altman Z2-Score Related Terms
Clean Harbors Altman Z2-Score Historical Data
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The historical data trend for Clean Harbors's Altman Z2-Score can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
CLH vs GFL, CWST, NVRI: Altman Z2-Score Comparison
For the Waste Management subindustry, Clean Harbors's Altman Z2-Score, along with its competitors' market caps and Altman Z2-Score data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Clean Harbors Altman Z2-Score vs Waste Management Industry
For the Waste Management industry and Industrials sector, Clean Harbors's Altman Z2-Score distribution charts can be found below:
* The bar in red indicates where Clean Harbors's Altman Z2-Score falls into.
Altman Z-Score model is an accurate forecaster of failure up to two years prior to distress. It can be considered the assessment of the distress of industrial corporations.
Z2-Score, also known as Z"-Score is the Z-Score for non-manufacturing companies excluding property/financial companies.
Clean Harbors's Altman Z2-Score for today is calculated with this formula:
Z
=
6.56
*
X1
+
3.26
*
X2
+
6.72
*
X3
+
1.05
*
X4_2
=
6.56
*
0.1854
+
3.26
*
0.3733
+
6.72
*
0.0934
+
1.05
*
0.581
=
3.67
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency. GuruFocus does not calculate Altman Z2-Score when X4_2 value is 0.
Clean Harbors (CLH) has a Altman Z2-Score of 3.67 as of Jun. 25, 2026. Z2-Score is the Z-Score for non-manufacturing companies excluding property/financial companies, which measures a company's bankruptcy risk. View historical data on Clean Harbors and its competitors. This is 25% above median its historical median of 2.94. Over the past decade, Clean Harbors' Altman Z2-Score has ranged from 2.02 to 3.71. According to the industry distribution chart, Clean Harbors ranks #87 out of 246 companies in the Waste Management industry, placing it in the top 35.4%.
Is Clean Harbors' Altman Z2-Score too high?
Clean Harbors' current Altman Z2-Score of 3.67 is 25% above median its 10-year median of 2.94. Over the past 10 years, this metric has ranged from a low of 2.02 to a high of 3.71. The Waste Management industry median Altman Z2-Score is 2.19. Clean Harbors' value of 3.67 is 67.6% above this industry median. Based on the distribution chart, Clean Harbors ranks #87 out of 246 companies in the Waste Management industry, which is above the industry midpoint. Overall, Clean Harbors has a GF Score™ of 87/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Clean Harbors' Altman Z2-Score compare to GFL and CWST?
According to the Waste Management industry distribution chart, Clean Harbors ranks #87 out of 246 companies for Altman Z2-Score. This puts Clean Harbors in the upper half of its industry. The industry median Altman Z2-Score is 2.19. Clean Harbors' value of 3.67 is 67.6% above this benchmark. Historically, Clean Harbors' own Altman Z2-Score has ranged from 2.02 to 3.71 over the past decade. While the company's 10-year median is 2.94 vs. the industry median of 2.19, Clean Harbors has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Altman Z2-Score for a Waste Management company?
The median Altman Z2-Score among Waste Management companies is 2.19, based on 246 companies in the industry. Companies in the top quartile (top 25%) have a Altman Z2-Score significantly above this median, while those in the bottom quartile fall well below. However, Altman Z2-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Clean Harbors's current Altman Z2-Score of 3.67 is 67.6% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Altman Z2-Score mean?
A high Altman Z2-Score can signal that a stock is expensive relative to its fundamentals. Z2-Score is the Z-Score for non-manufacturing companies excluding property/financial companies, which measures a company's bankruptcy risk. View historical data on Clean Harbors and its competitors. For the Waste Management industry, the median Altman Z2-Score is 2.19 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Clean Harbors's current Altman Z2-Score is 3.67, which is 25% above median its own 10-year median of 2.94. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Clean Harbors stock overvalued right now?
Based on GuruFocus' analysis, Clean Harbors (CLH) is currently considered Modestly Overvalued. The stock's GF Value™ is $243.43, compared to a current price of $302.10 — trading 24.1% above its estimated fair value. The current Altman Z2-Score is 3.67, which is 25% above median its 10-year median of 2.94 and 67.6% above the Waste Management industry median of 2.19. Clean Harbors' overall GF Score™ is 87/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Altman Z2-Score calculated?
Altman Z2-Score is calculated from a company's financial statements. For Clean Harbors (CLH), the current Altman Z2-Score is 3.67 as of Jun. 25, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Clean Harbors (CLH) Overvalued in 2026?
Based on GuruFocus' analysis, Clean Harbors stock appears to be overvalued.
The current stock price of $302.10 is trading 24.1% above its estimated GF Value™ of $243.43.
GuruFocus considers Clean Harbors to be Modestly Overvalued.
Key valuation signals for CLH:
Altman Z2-Score: 3.67 (25% above median its 10-year median of 2.94)
GF Value™: $243.43 vs. price of $302.10 (24.1% above fair value)
Industry Position: 67.6% above the Waste Management median (#87 of 246)
No single metric tells the full story. See the CLH stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Clean Harbors Inc is an environmental and industrial services provider that provides parts cleaning and related environmental services to commercial, industrial, and automotive customers. Its business segments are Environmental Services and Safety-Kleen Sustainability Solutions. Environmental Services includes waste collection, transportation, treatment, recycling, and disposal, along with industrial maintenance services. Safety-Kleen Sustainability Solutions provides used oil collection and manufactures base oil, vacuum gas oil, and lubricants. The company generates the majority of its revenues from the Environmental Services segment and operates in the United States, with maximum revenue, and Canada.
87GF Score
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