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Sectors & IndustriesIndustrialsPollution & Treatment Controls
Best Pollution & Treatment Control Stocks to Buy Now (2025)
Top pollution & treatment control stocks in 2025 ranked by overall Zen Rating. "A" Rated stocks have returned an average of +32.52% per year, and are the best pollution & treatment control stocks to buy now. Learn More.

Industry: Pollution & Treatment Con...
Overview
Zen RatingPriceValueGrowthFinancialsMomentumSentimentForecastDividendsDue Diligence
C
Pollution & Treatment Controls is Zen Rated C and is the 71st ranked industry out of 145 stock market industries
Learn how the Zen Ratings work
Ticker
Company
Exchange
Industry
Zen Rating
Market Cap
Price
1d %
EBITDA
P/E
D/E
Country
DD Score
ERII
ENERGY RECOVERY INC
NASDAQ
Pollution & Treatment Controls
$849.06M$15.450.32%$31.56M38.63x0.16
United States
ZWS
ZURN ELKAY WATER SOLUTIONS CORP
NYSE
Pollution & Treatment Controls
$5.71B$33.96-0.61%$344.70M34.30x0.69
United States
FSS
FEDERAL SIGNAL CORP
NYSE
Pollution & Treatment Controls
$4.96B$81.437.63%$355.90M23.53x0.56
United States
VLTO
VERALTO CORP
NYSE
Pollution & Treatment Controls
$23.77B$95.903.02%$1.31B27.09x1.88
United States
CECO
CECO ENVIRONMENTAL CORP
NASDAQ
Pollution & Treatment Controls
$839.02M$23.796.49%$100.60M17.49x2.33
United States
ATMU
ATMUS FILTRATION TECHNOLOGIES INC
NYSE
Pollution & Treatment Controls
$2.87B$34.670.70%$300.20M15.55x4.23
United States
ARQ
ARQ INC
NASDAQ
Pollution & Treatment Controls
$159.23M$3.790.53%$6.58M-27.07x0.31
United States
ADUR
ADURO CLEAN TECHNOLOGIES INC
NASDAQ
Pollution & Treatment Controls
$156.40M$5.4110.63%N/AN/A0.08
Canada
PCT
PURECYCLE TECHNOLOGIES INC
NASDAQ
Pollution & Treatment Controls
$1.20B$6.71-3.59%-$197.66M-3.83x3.42
United States
ZONE
CLEANCORE SOLUTIONS INC
NYSEMKT
Pollution & Treatment Controls
$11.72M$1.403.32%-$2.93M-2.92x1.78
United States
CLWT
EURO TECH HOLDINGS CO LTD
NASDAQ
Pollution & Treatment Controls
$8.44M$1.09-4.70%N/A3.91x0.25
Hong Kong
CHNR
CHINA NATURAL RESOURCES INC
NASDAQ
Pollution & Treatment Controls
$5.60M$0.571.43%-$1.49M-2.45x2.34
Hong Kong
DEVS
DEVVSTREAM CORP
NASDAQ
Pollution & Treatment Controls
$6.20M$0.21-2.37%N/AN/A-1.14
Canada
LIQT
LIQTECH INTERNATIONAL INC
NASDAQ
Pollution & Treatment Controls
$14.22M$1.48-6.92%-$7.48M-0.90x0.95
Denmark
FTEK
FUEL TECH INC
NASDAQ
Pollution & Treatment Controls
$29.51M$0.960.00%-$1.41M-16.02x0.16
United States
TOMZ
TOMI ENVIRONMENTAL SOLUTIONS INC
NASDAQ
Pollution & Treatment Controls
$15.69M$0.780.90%-$3.63M-3.56x1.37
United States
SCWO
374WATER INC
NASDAQ
Pollution & Treatment Controls
$47.57M$0.3317.50%-$12.17M-3.66x0.24
United States
CLIR
CLEARSIGN TECHNOLOGIES CORP
NASDAQ
Pollution & Treatment Controls
$31.08M$0.599.21%-$5.03M-5.39x0.16
United States
1

Pollution & Treatment Control Stocks FAQ

What are the best pollution & treatment control stocks to buy right now in May 2025?

According to Zen Ratings, our proprietary rating system that evaluates 115 factors proven to drive growth in stocks and assigns each stock in our system an overall letter grade as well as 7 individual Component Grades for Value, Growth, Momentum, Sentiment, Safety, Financials, and proprietary AI algorithms, the 3 best pollution & treatment control stocks to buy right now are:

1. Energy Recovery (NASDAQ:ERII)


Energy Recovery (NASDAQ:ERII) is the #1 top pollution & treatment control stock out of 18 with a Zen Rating of B. Stocks with a rating of B have had an average return of +19.88% per year. Learn more.

The Component Grade breakdown for Energy Recovery (NASDAQ:ERII) is: Value: C, Growth: C, Momentum: C, Sentiment: C, Safety: D, Financials: A, and AI: A.

Energy Recovery (NASDAQ:ERII) has a Due Diligence Score of 55, which is 25 points higher than the pollution & treatment control industry average of 30.

ERII passed 18 out of 33 due diligence checks and has strong fundamentals. Energy Recovery has seen its stock return 3.69% over the past year, overperforming other pollution & treatment control stocks by 6 percentage points.

Energy Recovery has an average 1 year price target of $20.67, an upside of 33.77% from Energy Recovery's current stock price of $15.45.

Energy Recovery stock has a consensus Strong Buy recommendation according to Wall Street analysts. Of the 3 analysts covering Energy Recovery, 66.67% have issued a Strong Buy rating, 33.33% have issued a Buy, 0% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

2. Zurn Elkay Water Solutions (NYSE:ZWS)


Zurn Elkay Water Solutions (NYSE:ZWS) is the #2 top pollution & treatment control stock out of 18 with a Zen Rating of C. Stocks with a rating of C have had an average return of +7.53% per year. Learn more.

The Component Grade breakdown for Zurn Elkay Water Solutions (NYSE:ZWS) is: Value: C, Growth: C, Momentum: C, Sentiment: C, Safety: B, Financials: B, and AI: C.

Zurn Elkay Water Solutions (NYSE:ZWS) has a Due Diligence Score of 38, which is 8 points higher than the pollution & treatment control industry average of 30.

ZWS passed 14 out of 38 due diligence checks and has average fundamentals. Zurn Elkay Water Solutions has seen its stock return 8.57% over the past year, overperforming other pollution & treatment control stocks by 11 percentage points.

Zurn Elkay Water Solutions has an average 1 year price target of $37.33, an upside of 9.93% from Zurn Elkay Water Solutions's current stock price of $33.96.

Zurn Elkay Water Solutions stock has a consensus Buy recommendation according to Wall Street analysts. Of the 3 analysts covering Zurn Elkay Water Solutions, 33.33% have issued a Strong Buy rating, 0% have issued a Buy, 66.67% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

3. Federal Signal (NYSE:FSS)


Federal Signal (NYSE:FSS) is the #3 top pollution & treatment control stock out of 18 with a Zen Rating of C. Stocks with a rating of C have had an average return of +7.53% per year. Learn more.

The Component Grade breakdown for Federal Signal (NYSE:FSS) is: Value: C, Growth: C, Momentum: C, Sentiment: C, Safety: B, Financials: A, and AI: A.

Federal Signal (NYSE:FSS) has a Due Diligence Score of 54, which is 24 points higher than the pollution & treatment control industry average of 30.

FSS passed 20 out of 38 due diligence checks and has strong fundamentals. Federal Signal has seen its stock return 0.16% over the past year, overperforming other pollution & treatment control stocks by 2 percentage points.

Federal Signal has an average 1 year price target of $95.00, an upside of 16.66% from Federal Signal's current stock price of $81.43.

Federal Signal stock has a consensus Buy recommendation according to Wall Street analysts. Of the 2 analysts covering Federal Signal, 0% have issued a Strong Buy rating, 50% have issued a Buy, 50% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

What are the pollution & treatment control stocks with highest dividends?

Out of 5 pollution & treatment control stocks that have issued dividends in the past year, the 3 pollution & treatment control stocks with the highest dividend yields are:

1. Euro Tech Holdings Co (NASDAQ:CLWT)


Euro Tech Holdings Co (NASDAQ:CLWT) has an annual dividend yield of 7.31%, which is 5 percentage points higher than the pollution & treatment control industry average of 1.84%.

Euro Tech Holdings Co's dividend payout ratio of 28.6% indicates that its high dividend yield is sustainable for the long-term.

2. Zurn Elkay Water Solutions (NYSE:ZWS)


Zurn Elkay Water Solutions (NYSE:ZWS) has an annual dividend yield of 1%, which is -1 percentage points lower than the pollution & treatment control industry average of 1.84%. Zurn Elkay Water Solutions's dividend payout is not stable, having dropped more than 10% one times in the last 10 years. Zurn Elkay Water Solutions's dividend has shown consistent growth over the last 10 years.

Zurn Elkay Water Solutions's dividend payout ratio of 34.3% indicates that its dividend yield is sustainable for the long-term.

3. Federal Signal (NYSE:FSS)


Federal Signal (NYSE:FSS) has an annual dividend yield of 0.61%, which is -1 percentage points lower than the pollution & treatment control industry average of 1.84%. Federal Signal's dividend payout is stable, having never dropped by more than 10% in the last 10 years. Federal Signal's dividend has shown consistent growth over the last 10 years.

Federal Signal's dividend payout ratio of 14.5% indicates that its dividend yield is sustainable for the long-term.

Why are pollution & treatment control stocks up?

Pollution & treatment control stocks were up 3.48% in the last day, and up 7.5% over the last week. Federal Signal was the among the top gainers in the pollution & treatment controls industry, gaining 7.63% yesterday.

Federal Signal shares are trading higher after the company reported better-than-expected Q1 financial results and raised its FY25 adjusted EPS guidance.

What are the most undervalued pollution & treatment control stocks?

Based on the Valuation rating, one of the 7 components of a stocks overall Zen Ratings grade, which evaluates factors including estimated earnings yield, earnings before interest and taxes/enterprise value, cash flow yield, free cash flow to price, and price-to-earnings growth (PEG ratio), the 3 most undervalued pollution & treatment control stocks right now are:

1. Atmus Filtration Technologies (NYSE:ATMU)


Atmus Filtration Technologies (NYSE:ATMU) is the most undervalued pollution & treatment control stock based on its Valuation Rating of C. Valuation is one of 7 Component Grades used to calculate the overall Zen Rating.

Atmus Filtration Technologies has a valuation score of 29, which is 8 points higher than the pollution & treatment control industry average of 21. It passed 2 out of 7 valuation due diligence checks.

Atmus Filtration Technologies's stock has gained 14.46% in the past year. It has overperformed other stocks in the pollution & treatment control industry by 16 percentage points.

2. Ceco Environmental (NASDAQ:CECO)


Ceco Environmental (NASDAQ:CECO) is the second most undervalued pollution & treatment control stock based on its Valuation Rating of C. Valuation is one of 7 Component Grades used to calculate the overall Zen Rating.

Ceco Environmental has a valuation score of 43, which is 22 points higher than the pollution & treatment control industry average of 21. It passed 3 out of 7 valuation due diligence checks.

Ceco Environmental's stock has gained 10.04% in the past year. It has overperformed other stocks in the pollution & treatment control industry by 12 percentage points.

3. Zurn Elkay Water Solutions (NYSE:ZWS)


Zurn Elkay Water Solutions (NYSE:ZWS) is the third most undervalued pollution & treatment control stock based on its Valuation Rating of C. Valuation is one of 7 Component Grades used to calculate the overall Zen Rating.

Zurn Elkay Water Solutions has a valuation score of 14, which is -7 points higher than the pollution & treatment control industry average of 21. It passed 1 out of 7 valuation due diligence checks.

Zurn Elkay Water Solutions's stock has gained 8.57% in the past year. It has overperformed other stocks in the pollution & treatment control industry by 11 percentage points.

Are pollution & treatment control stocks a good buy now?

69.23% of pollution & treatment control stocks rated by analysts are a buy right now. On average, analysts expect pollution & treatment control stocks to rise by 40.38% over the next year.

0% of pollution & treatment control stocks have a Zen Rating of A (Strong Buy), 11.11% of pollution & treatment control stocks are rated B (Buy), 55.56% are rated C (Hold), 0% are rated D (Sell), and 33.33% are rated F (Strong Sell).

What is the average p/e ratio of the pollution & treatment controls industry?

The average P/E ratio of the pollution & treatment controls industry is 25.53x.
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