Sectors & Industries IndustrialsPollution & Treatment Controls
Best Pollution & Treatment Control Stocks to Buy Now (2026)
Top pollution & treatment control stocks in 2026 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...

Growth Financials Momentum Sentiment Forecast Dividends Due Diligence

Pollution & Treatment Controls is Zen Rated D and is the 111th ranked industry out of 145 stock market industries

Ticker	Company	Price	Graham Fair Value	Graham Fair Value %	P/E	Forward P/E	P/S	P/B	PEG	Free Cash Flow	Free Cash Flow Yield	Book Value	BVPS	EV	EV/EBITDA
ZWS	ZURN ELKAY WATER SOLUTIONS CORP	$49.67	$15.03	230.47%	39.42x	27.99x	4.79x	5.16x	2.06x	$320.70M	3.85%	$1.61B	9.58	$8.55B	21.67
FSS	FEDERAL SIGNAL CORP	$115.08	$40.92	181.22%	25.80x	23.46x	2.99x	4.89x	2.32x	$290.60M	4.15%	$1.43B	23.56	$7.53B	16.43
ATMU	ATMUS FILTRATION TECHNOLOGIES INC	$53.98	$23.79	126.94%	20.92x	18.13x	2.41x	10.93x	1.86x	$158.00M	3.59%	$403.50M	4.95	$5.20B	15.09
VLTO	VERALTO CORP	$85.27	$34.16	149.64%	21.81x	19.73x	3.77x	6.97x	2.21x	$1.04B	4.93%	$3.01B	12.14	$22.17B	16.06
CECO	CECO ENVIRONMENTAL CORP	$86.08	$19.25	347.06%	220.72x	50.64x	3.82x	9.89x	1.72x	-$6.02M	-0.20%	$312.20M	8.75	$3.32B	50.22
ARQ	ARQ INC	$2.63	N/A	N/A	-2.02x	-34.24x	0.90x	0.67x	N/A	-$3.04M	-2.78%	$167.81M	4.02	$138.40M	-3.54
ERII	ENERGY RECOVERY INC	$8.62	$7.14	20.72%	22.68x	14.98x	3.32x	2.41x	0.58x	$27.19M	5.99%	$184.29M	3.50	$394.20M	13.90
FTEK	FUEL TECH INC	$1.45	N/A	N/A	-16.11x	-20.31x	1.71x	1.17x	N/A	-$270.00k	-0.62%	$38.56M	1.24	$36.64M	-16.66
ADUR	ADURO CLEAN TECHNOLOGIES INC	$14.27	N/A	N/A	-33.42x	N/A	2,854.00x	16.43x	N/A	-$11.33M	-2.40%	$29.22M	0.89	$451.50M	-35.59
ZONE	CLEANCORE SOLUTIONS INC	$0.59	N/A	N/A	-0.37x	N/A	36.88x	1.96x	N/A	-$14.97M	-11.69%	$66.80M	0.31	$114.20M	-0.75
PCT	PURECYCLE TECHNOLOGIES INC	$12.39	N/A	N/A	-9.25x	-11.66x	206.50x	301.85x	N/A	-$175.80M	-7.86%	$7.42M	0.04	$2.58B	-20.57
TOMZ	TOMI ENVIRONMENTAL SOLUTIONS INC	$0.80	N/A	N/A	-3.80x	-4.90x	2.85x	31,524.86x	N/A	-$635.90k	-3.88%	$550.00	0.00	$20.59M	-6.22
SCWO	374WATER INC	$2.29	N/A	N/A	-1.66x	-56.00x	163.21x	5.93x	N/A	-$16.22M	-46.61%	$6.72M	0.44	$38.04M	-1.90
DEVS	DEVVSTREAM CORP	$0.19	N/A	N/A	-0.08x	N/A	23.63x	-0.05x	N/A	-$8.32M	-1,033.86%	-$19.28M	-4.53	$12.13M	-1.84
CLWT	EURO TECH HOLDINGS CO LTD	$1.16	N/A	N/A	58.00x	N/A	0.66x	0.55x	N/A	-$1.42M	-16.12%	$15.62M	2.05	$3.26M	70.82
CHNR	CHINA NATURAL RESOURCES INC	$4.39	N/A	N/A	-12.06x	N/A	N/A	0.38x	N/A	-$1.02M	-22.26%	$12.15M	11.60	$4.17M	-10.66
LIQT	LIQTECH INTERNATIONAL INC	$2.12	N/A	N/A	-2.30x	-3.41x	1.30x	2.77x	N/A	-$7.13M	-34.15%	$7.63M	0.77	$31.25M	-5.07
CLIR	CLEARSIGN TECHNOLOGIES CORP	$5.21	N/A	N/A	-5.26x	-5.10x	5.52x	2.95x	N/A	-$4.74M	-16.41%	$9.53M	1.72	$19.14M	-3.67
RAIN	RAIN ENHANCEMENT TECHNOLOGIES HOLDCO INC	$1.73	N/A	N/A	-1.44x	N/A	N/A	-1.11x	N/A	-$2.94M	-22.43%	-$12.75M	-1.68	$23.46M	-2.67

Pollution & Treatment Control Stocks FAQ

What are the best pollution & treatment control stocks to buy right now in May 2026?

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. Zurn Elkay Water Solutions (NYSE:ZWS)

Zurn Elkay Water Solutions (NYSE:ZWS) is the #1 top pollution & treatment control stock out of 19 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 Zurn Elkay Water Solutions (NYSE:ZWS) is: Value: C, Growth: C, Momentum: C, Sentiment: B, Safety: B, Financials: B, and AI: B.

Zurn Elkay Water Solutions (NYSE:ZWS) has a Due Diligence Score of 45, which is 17 points higher than the pollution & treatment control industry average of 28.

ZWS passed 17 out of 38 due diligence checks and has strong fundamentals. Zurn Elkay Water Solutions has seen its stock return 34.68% over the past year, overperforming other pollution & treatment control stocks by 10 percentage points.

Zurn Elkay Water Solutions has an average 1 year price target of $56.60, an upside of 13.95% from Zurn Elkay Water Solutions's current stock price of $49.67.

Zurn Elkay Water Solutions stock has a consensus Buy recommendation according to Wall Street analysts. Of the 5 analysts covering Zurn Elkay Water Solutions, 40% have issued a Strong Buy rating, 20% have issued a Buy, 40% have issued a hold, while 0% have issued a Sell rating, and 0% have issued a Strong Sell.

2. Federal Signal (NYSE:FSS)

Federal Signal (NYSE:FSS) is the #2 top pollution & treatment control stock out of 19 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 Federal Signal (NYSE:FSS) is: Value: C, Growth: C, Momentum: C, Sentiment: B, Safety: C, Financials: B, and AI: B.

Federal Signal (NYSE:FSS) has a Due Diligence Score of 56, which is 28 points higher than the pollution & treatment control industry average of 28.

FSS passed 21 out of 38 due diligence checks and has strong fundamentals. Federal Signal has seen its stock return 22.73% over the past year, underperforming other pollution & treatment control stocks by -2 percentage points.

Federal Signal has an average 1 year price target of $134.00, an upside of 16.44% from Federal Signal's current stock price of $115.08.

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

3. Atmus Filtration Technologies (NYSE:ATMU)

Atmus Filtration Technologies (NYSE:ATMU) is the #3 top pollution & treatment control stock out of 19 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 Atmus Filtration Technologies (NYSE:ATMU) is: Value: C, Growth: C, Momentum: C, Sentiment: C, Safety: C, Financials: B, and AI: C.

Atmus Filtration Technologies (NYSE:ATMU) has a Due Diligence Score of 44, which is 16 points higher than the pollution & treatment control industry average of 28.

ATMU passed 18 out of 38 due diligence checks and has strong fundamentals. Atmus Filtration Technologies has seen its stock return 40.65% over the past year, overperforming other pollution & treatment control stocks by 16 percentage points.

Atmus Filtration Technologies has an average 1 year price target of $62.67, an upside of 16.09% from Atmus Filtration Technologies's current stock price of $53.98.

Atmus Filtration Technologies stock has a consensus Buy recommendation according to Wall Street analysts. Of the 3 analysts covering Atmus Filtration Technologies, 33.33% have issued a Strong Buy rating, 33.33% have issued a Buy, 33.33% 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 4 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. Federal Signal (NYSE:FSS)

Federal Signal (NYSE:FSS) has an annual dividend yield of 0.5%, which is the same as the pollution & treatment control industry average of 0.43%. 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 12.8% indicates that its dividend yield is sustainable for the long-term.

2. Veralto (NYSE:VLTO)

Veralto (NYSE:VLTO) has an annual dividend yield of 0.43%, which is the same as the pollution & treatment control industry average of 0.43%.

Veralto's dividend payout ratio of 12.3% indicates that its dividend yield is sustainable for the long-term.

3. Zurn Elkay Water Solutions (NYSE:ZWS)

Zurn Elkay Water Solutions (NYSE:ZWS) has an annual dividend yield of 0.4%, which is the same as the pollution & treatment control industry average of 0.43%. 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 31.7% indicates that its dividend yield is sustainable for the long-term.

Why are pollution & treatment control stocks up?

Pollution & treatment control stocks were up 2.15% in the last day, and down -0.39% over the last week. Aduro Clean Technologies was the among the top gainers in the pollution & treatment controls industry, gaining 11.92% yesterday.

Shares of stocks within the broader tech sector are trading higher amid possible sympathy with Cisco Systems after the company reported Q3 financial results. The tech stock rally may be due to earlier economic data and the U.S.-China talks, which included Tesla CEO Musk and Nvidia CEO Huang.

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. Veralto (NYSE:VLTO)

Veralto (NYSE:VLTO) 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.

Veralto has a valuation score of 14, which is 1 points higher than the pollution & treatment control industry average of 13. It passed 1 out of 7 valuation due diligence checks.

Veralto's stock has dropped -14.27% in the past year. It has underperformed other stocks in the pollution & treatment control industry by -39 percentage points.

2. Atmus Filtration Technologies (NYSE:ATMU)

Atmus Filtration Technologies (NYSE:ATMU) 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.

Atmus Filtration Technologies has a valuation score of 29, which is 16 points higher than the pollution & treatment control industry average of 13. It passed 2 out of 7 valuation due diligence checks.

Atmus Filtration Technologies's stock has gained 40.65% in the past year. It has overperformed other stocks in the pollution & treatment control industry by 16 percentage points.

3. Federal Signal (NYSE:FSS)

Federal Signal (NYSE:FSS) 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.

Federal Signal has a valuation score of 29, which is 16 points higher than the pollution & treatment control industry average of 13. It passed 2 out of 7 valuation due diligence checks.

Federal Signal's stock has gained 22.73% in the past year. It has underperformed other stocks in the pollution & treatment control industry by -2 percentage points.

Are pollution & treatment control stocks a good buy now?

70% of pollution & treatment control stocks rated by analysts are a buy right now. On average, analysts expect pollution & treatment control stocks to rise by 20.92% over the next year.

0% of pollution & treatment control stocks have a Zen Rating of A (Strong Buy), 18.18% of pollution & treatment control stocks are rated B (Buy), 36.36% are rated C (Hold), 27.27% are rated D (Sell), and 18.18% 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 36.14x.

WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.