(don't) Waste Water! | Water Tech to Solve the World

How did HG Ventures quietly become one of the most active water tech investors on the planet, without even calling itself a water VC?

HG Ventures is the corporate venture capital arm of The Heritage Group, a 100-year-old, family-owned Indianapolis conglomerate active in asphalt, quarries, environmental services and specialty chemicals. With $350M in assets, the fund deploys around $50M a year across 41 portfolio companies and 7 sectors, and ranks 5th globally in water tech by deal count despite water being only 18% of its thesis.

Ginger Rothrock holds a PhD in chemistry from UNC Chapel Hill, co-founded the NASDAQ-listed pharmaceutical company Liquidia, was promoted to Managing Director of HG Ventures in December 2025, and is a Global Corporate Venturing Rising Star and Kauffman Fellow with deep expertise in industrial water, industrial wastewater treatment, and corporate venture capital in cleantech.

🌶️ KEY SPICES 🌶️
🏗️ How a 100-year-old asphalt-and-quarries empire ended up running one of the most active water tech portfolios on the planet
🧪 Why a PhD chemist with 75 R&D scientists down the hallway puts technology last, and storytelling first, when she evaluates water tech founders
💧 How HG Ventures built its industrial wastewater treatment, industrial water reuse and zero liquid discharge thesis from the inside out
⚡ Why a 4-person investment team and a 2-month decision cycle out-deal-flow every other corporate venture capital fund in the water industry
🎯 Why Ginger Rothrock calls the water industry "inevitable", and how HG Ventures is positioning for the next decade of water tech exits

🥜 IN A NUTSHELL 🥜
Who are the biggest water tech investors and venture capital firms in 2026?
The most active water tech investors by deal count are Burnt Island Ventures, Echo River Capital, PureTerra Ventures, Emerald Technology Ventures, and HG Ventures, the corporate venture capital arm of The Heritage Group, ranked 5th globally despite water being only 18% of its thesis.

What is corporate venture capital (CVC) and how does it differ from traditional venture capital?
Corporate venture capital is venture investing from inside a corporation rather than from an independent fund, which means a CVC like HG Ventures can hold portfolio companies for a decade or more without the LP pressure that kills the average CVC at year four.

How do you pitch a venture capital firm to fund a water tech startup?
Most water tech VCs filter pitches on whether the fund can actually help you commercially, whether you understand the market problem (especially who your real competition is), and whether you can tell a clear story under five minutes, and most water tech founders lose by leading with the technology.

Is the water industry a good long-term investment in 2026?
Yes, water tech venture capital deal counts have quadrupled since 2018, but capital flows mostly through specialist venture capital, corporate venture capital and private equity rather than the public market, because most water stocks underperformed in the 2020s.

What is industrial water reuse, and what is zero liquid discharge?
Industrial water reuse is treating a facility's wastewater on-site and recycling it back into the process, while zero liquid discharge is the extreme version where 100% of the water is recovered, and both are accelerating because of rising freshwater costs, tightening discharge regulations and corporate ESG targets.

#️⃣ Mentioned Links #️⃣
HG Ventures — hgventures.com

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The First Water Sector Unicorn Wants to IPO. But Wall Street kinda forgot how to buy water...

Early-stage water tech funding quadrupled in seven years. Private equity's share of water M&A doubled in a decade, with a record 165 PE-led acquisitions in a single year. The bench of PE-owned water platforms grew from 42 companies in 2015 to nearly 600 in 2025. And the sector just minted its first twice-unicorn - Gradiant - with a Series E at a $2 billion valuation on Day 1 of the Global Water Summit 2026! So, will Gradiant IPO?

Four all-time highs at once... but the fifth dimension - the public market - went the other way. IPOs in the 2020s are a pale echo of the 2010. So I flew to Madrid to ask the people building the machine (the VCs, the PE platforms, the strategics, the bankers, the entrepreneurs) a single question: is this closed-loop water-capital machine a feature of a mature sector, or a $300 billion pressure cooker about to crack?

🌶️ KEY SPICES 🌶️
💵 108 funding rounds in early-stage water tech in 2025 alone vs. 33 in 2018: 3.3× the count and roughly 5× the dollars
🏗️ 42 → ~600 PE-owned water platforms in a decade, with 165 PE acquisitions in 2025 (the most ever)... but 80 of them sub-$10M targets: high velocity, low ticket
🦄 Gradiant's Series E at $2B valuation announced Day 1 of GWS 2026. What Anurag Bajpayee told me: "We have to be ready to go public because we want to control our destiny"
💰 Four specialist water VC funds raising at the exact same time: a feature or a weakness?
🏢 Summa Equity (€10B+ Nordic thematic PE) entering water for the first time, targeting the missing middle

🥜 IN A NUTSHELL 🥜
Is water tech actually a good investment in 2026? Water-tech venture capital just hit an all-time high. Early-stage funding rounds quadrupled in seven years (from 33 in 2018 to 108 in 2025) and total water VC inflow exceeded $1 billion in 2024. Private equity also set a record with 165 water-company acquisitions in 2025, roughly double its 2015 share of the market. The catch: with almost zero water IPOs in a decade, investor returns flow mostly through PE-to-PE handoffs and strategic acquisitions, not the public market.

What is Gradiant and why does its $2 billion Series E matter? Gradiant is a Boston-area water-treatment company specializing in industrial-water reuse, brine management, and ultrapure water for semiconductor and AI data-center fabs. They just announced a Series E at a $2 billion valuation, making it water tech's first twice-unicorn. CEO Anurag Bajpayee announced on camera that the company is preparing to go public, which would be the first venture-stage water IPO in over a decade.

Why are there no water IPOs if the sector is growing so fast? The public-market track record is brutal. Of Global Water Intelligence's 2022 list of 30 listed water stocks, 21 lost more than two-thirds of their value by 2026. The listed water universe is small (about 139 stocks worth roughly $122 billion in total) and too illiquid to absorb new venture-stage water IPOs. Instead, the sector built its own private-market exit machine.

#️⃣ Mentioned Links #️⃣
WTF Is Happening with Water Stocks? https://www.youtube.com/watch?v=Flen_vwx0kQ
5 Water Tech Investment Facts (that will blow your mind): https://www.youtube.com/watch?v=aCfcigu_oPQ
Global Water Intelligence — globalwaterintel.com (check out their new WIN and Euro WIN AI platforms!)

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On April 30, 2026, CRH plc (NYSE: CRH) announced a $700 million agreement to acquire Axius Water from KKR and XPV Water Partners - instantly making the Irish-American building materials giant one of the largest water infrastructure players in North America. If CRH acquires Axius, what's next?

Most investors missed it, so I thought I'd decode it!
Here are the 10 things you need to see.

So you got it, CRH acquires Axius. Here's the deal in 30 seconds:
• Buyer: CRH plc - a $77B market cap building materials company most water investors don't track
• Target: Axius Water - a wastewater treatment platform built by KKR and XPV Water Partners through a multi-year roll-up
• Price: $700M (reported)
• Sellers: KKR (Global Impact Fund) and XPV Water Partners
• Strategic logic: bolts wastewater treatment onto CRH's existing water infrastructure portfolio (Hydro International, Oldcastle Infrastructure)

What's actually new here - and why it matters for water investors:
00:00 - On your Bingo Card?
02:30 #1: The Cast
07:35 #2: The Substance
11:40 #3: The Number
16:23 #4: The Timing
20:54 #5: The Macro Reality
24:40 #6: The Credibility
28:26 #7: Inside the Platform
32:28 #8: The Synergy Story
35:17 #9: The Risks
39:58 #10: The Sector Signal

📰 Sources & further reading:
• CRH Q1 2026 earnings call transcript: https://www.crh.com/investors/results-presentations/
• KKR Global Impact Fund: https://www.kkr.com/approach/sustainability/sustainable-investing/trends
• XPV Water Partners portfolio: https://xpvwaterpartners.com/companies
• Axius Water: https://www.axiuswater.com/
• My newsletter on Water Infrastructure: https://www.linkedin.com/pulse/us-water-bill-4x-what-everyone-thinks-antoine-walter-3rqnc/

🎙️ If we don't know each other, Hi, I'm Antoine Walter! I help newcomer investors decode the water tech sector. Each week, I break down a water deal (like here, when CRH acquires Axius), technology, or company through an investor-forward lens. No acronyms, no jargon (hopefully) just the signals that matter.

🔔 Subscribe for weekly water investment briefs: youtube.com/channel/UCsMC1BYAun2JtMT177jTGOw/
🎧 Podcast version: https://feed.ausha.co/br23DCZ1GnG3
💼 LinkedIn: https://www.linkedin.com/in/antoinewalter1

⚠️ Disclaimer: This video is for informational and educational purposes only. Nothing here constitutes investment advice. Always do your own research.

#CRH #AxiusWater #KKR #XPVWaterPartners #WaterInvesting #WaterMA #WaterStocks #WaterInfrastructure #WastewaterTreatment #WaterTech #PrivateEquity #ImpactInvesting #ESG #WaterSector

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Everyone says AI is drinking the planet dry, right? Well, the numbers say your morning coffee uses 29,600× more water than a ChatGPT prompt!

In this episode, I sit down with Alex Passini to pressure-test the dominant narrative around AI's water footprint - and what we found completely flips the story the media is telling.

Here's what most "AI water crisis" headlines miss:
→ A single ChatGPT prompt uses roughly 16 milliliters of water. One cup of coffee uses ~140 liters when you count the beans. That's a 29,600× gap.
→ Of the water a hyperscale data center consumes, ~75% isn't used by AI at all — it's used upstream for the energy that powers it. Blame the grid, not the GPU.
→ One banana = ~6,250 ChatGPT prompts. One almond = ~12 prompts. The water-per-prompt math is rounding-error territory next to your lunch.
→ Florida already reuses 800 million gallons/day of treated wastewater. Data centers aren't the threat - they're an accelerant for the water reuse capex the sector has been waiting twenty years for.

If you're an investor trying to figure out whether AI's water story is a real thesis or a media artifact, this episode gives you the framework (and the numbers) to decide.

🧠 What you'll learn:
- Why "data center water consumption" and "AI water consumption" are not the same thing
- The actual per-prompt footprint of generative AI (modeled, not estimated)
- How water reuse technology turns the alarmist narrative into an investment opportunity
- Where the real bottleneck sits - and which sub-sectors stand to benefit

🎙️ Guest: Alex Passini (https://www.linkedin.com/in/alexpassini/)
Alex is Vice President of Business Development at CSA Group
CSA Group is hiring: https://csagroup.com/careers/
(I promised Alex in the podcast to put this in the show notes!)

📰 The newsletter behind the show: https://www.linkedin.com/newsletters/don-t-waste-water-6884833968848474112/
🎧 Podcast feed: https://feed.ausha.co/br23DCZ1GnG3
💼 LinkedIn: https://www.linkedin.com/in/antoinewalter1/
🔔 Subscribe if you want the unfiltered, numerate take on water sector investing - no jargon, no acronym soup, just the asymmetric bets worth pricing.

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Every analyst, every think tank, every consulting deck has an opinion on AI's water footprint (and overall on AI and Water)

But nobody bothered to ask the people actually watching the videos, posting the comments, and shaping the narrative. You'd need to be mad to do that, right?

So I read 2,540 of them. 😅

Across 9 of the most-watched YouTube videos on AI water consumption, and overall on AI and Water.
Here's what I found:
1️⃣ The public is right about geography. Boardman, Oregon, shows up at 80 comments per minute for a reason.
2️⃣ The public is right about the executives. The -0.20 sentiment around Sam Altman's "one-fifteenth of a teaspoon" line is actually a signal.
3️⃣ The public is wrong about closed-loop cooling. The most-liked comment on the entire dataset? Hank Green publicly correcting himself. 13,000 likes for "I was wrong."
4️⃣ And the public is missing the bigger story almost entirely — the one that's about to constrain AI before water ever does.

This is the third and final chapter of a trilogy on AI, water, and the trillion-dollar infrastructure thesis hiding behind the headlines - basically on AI and Water:
📍 Part 1 - Data Center Consumption DOESN'T Matter... But Discharge Does! → [https://www.youtube.com/watch?v=1o-cdb8xzZ0
📍 Part 2 - The 2027 Deadline That's About to Reprice Water Companies → https://www.youtube.com/watch?v=1PKHUo6q5gw
📍 Part 3 - You're watching it 😅

⏱️ Chapters
00:00 — Nobody asked. So I did.
01:44 — The dataset: 2,540 comments, 9 videos, 1 spreadsheet
03:58 — What the public got wrong (closed-loop cooling and the misleading-true problem)
07:07 — The most-liked comment on AI water — and why it matters
10:53 — What everyone is missing

🔬 Methodology 2,540 individual comments analyzed 9 source videos (the most-viewed English-language content on AI water consumption as of) Sentiment scoring + theme clustering done manually, then cross-checked

🏷️ Topics covered AI water consumption · AI water usage · data center cooling · AI environmental impact · closed-loop cooling · AI energy consumption · water sector investing · sustainability · generative AI infrastructure · AI data center water · Sam Altman water · Boardman Oregon data centers

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