Angel · WATER INVESTOR

Sand Hill Angels

Sand Hill Angels is a water-focused angel that has backed 1 water company since 2000. (don't) Waste Water rates its water commitment One-Off.

One-Off

Water Commitment

Type

Angel

Founded

2000

Stage

Seed - Series A

Median round

$2.2M

Portfolio

1 cos

Water Commitment Score

Tier

One-Off

1 water companies · last deal 2021 · leads ~0% of rounds · Med confidence

How this is scored ↗
as of Jun 2026 · no pay-to-rank

Compiled from official filings, third-party records, and direct intelligence from investors and founders, in Leviathan · recomputed monthly · as of Jun 2026.

How they invest

Seed1

Series A1

Median round$2.2Mrange $1.5M - $3M · 2 disclosed

Portfolio · 1 water companies

Membrion

Membrion is a developer of durable ceramic ion exchange membranes for electrodialysis treatment

$3MSeries A · 2021

See the full portfolio in Leviathan →

Invests alongside

Bellingham Angel Investors1x Sierra Angels1xE8 Angels (E8 Fund)1x

Highlighted = profiled on (don't) Waste Water.