Company lists · Data refreshed September 2026

Top 25 Aquifer management consultants based in the United States

RevenueBase identified 208 aquifer management consultants headquartered in the United States as of September 2026 and tracks 1,975 professional contacts across them, including 902 with verified work emails. Denver is the largest hub.

This list covers aquifer management consultants headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 27, 2026 86% judged on-target in blind review
208Companies
1,975Contacts tracked
902Verified emails
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The 25 largest aquifer management consultants based in the United States

Ranked by team size
Top 25 of 208 aquifer management consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to aquifer management consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceTucson, AZ, United StatesHQ checked Sep 27, 202651-200126 contacts →

Indirect evidence

“M&A is a water resource consulting firm that partners with clients to address their evolving water resource challenges.”

Source: RevenueBase Database · checked Sep 27, 2026
2Indirect evidenceDenver, CO, United StatesHQ checked Sep 27, 202651-20094 contacts →

Indirect evidence

“LRE Water is now Spheros Environmental.”

Source: RevenueBase Database · checked Sep 27, 2026
3Indirect evidenceAlbuquerque, NM, United StatesHQ checked Sep 27, 202651-20092 contacts →

Indirect evidence

“Daniel B.”

Source: RevenueBase Database · checked Sep 27, 2026
4Indirect evidenceDavis, CA, United StatesHQ checked Sep 27, 202651-20079 contacts →

Indirect evidence

“Larry Walker Associates (LWA) is a privately owned firm headquartered in Davis, California, with offices in Berkeley, Yreka, Santa Monica, Ventura, San Diego, and Seattle, WA.”

Source: RevenueBase Database · checked Sep 27, 2026
5Indirect evidenceTrenton, NJ, United StatesHQ checked Sep 27, 202651-20071 contacts →

Indirect evidence

“Experience, Expertise and Excellence in Water Resources, Ecology, and Geotechnical Engineering.”

Source: RevenueBase Database · checked Sep 27, 2026
6Indirect evidencePortland, OR, United StatesHQ checked Sep 27, 202651-20066 contacts →

Indirect evidence

“GSI Water Solutions, Inc, is a specialized groundwater, environmental, and water resources consulting firm.”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceRockville, MD, United StatesHQ checked Sep 27, 202651-20045 contacts →

Indirect evidence

“S.S.”

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceScottsdale, AZ, United StatesHQ checked Sep 27, 202611-5042 contacts →

Indirect evidence

“Clear Creek Associates, a hydrogeological consulting company, was started in September to provide a very high level of expertise in groundwater science.”

Source: RevenueBase Database · checked Sep 27, 2026
9Indirect evidenceTucson, AZ, United StatesHQ checked Sep 27, 202611-5041 contacts →

Indirect evidence

“GeoSystems Analysis, Inc.(GSA) has pioneered innovative solutions for industry and government since 1994.”

Source: RevenueBase Database · checked Sep 27, 2026
10Indirect evidenceChantilly, VA, United StatesHQ checked Sep 27, 202611-5037 contacts →

Indirect evidence

“GKY is one of Virginia’s largest consulting groups dedicated to water resources and environmental sciences.”

Source: RevenueBase Database · checked Sep 27, 2026
11Indirect evidenceGolden, CO, United StatesHQ checked Sep 27, 202611-5035 contacts →

Indirect evidence

“PG Environmental (PG) is an environmental consulting firm offering specialized technical expertise to federal and state agencies tasked with protecting and restoring our nation’s…”

Source: RevenueBase Database · checked Sep 27, 2026
12Indirect evidenceDavis, CA, United StatesHQ checked Sep 27, 202611-5028 contacts →

Indirect evidence

“Since 1993, Davids Engineering, Inc.”

Source: RevenueBase Database · checked Sep 27, 2026
13Indirect evidenceEnglewood, CO, United StatesHQ checked Sep 27, 202611-5025 contacts →

Indirect evidence

“A water rights and water resources consulting firm specializing in- western water rights - ground water geology - water resource planning Since 1980, BBA has been helping private…”

Source: RevenueBase Database · checked Sep 27, 2026
14Indirect evidenceSan Dimas, CA, United StatesHQ checked Sep 27, 202611-5023 contacts →

Indirect evidence

“Geoscience Support Services (GEOSCIENCE) provides vital, specialized consulting to help clients overcome their most complex groundwater resource challenges.”

Source: RevenueBase Database · checked Sep 27, 2026
15Indirect evidenceEdmonds, WA, United StatesHQ checked Sep 27, 202611-5023 contacts →

Indirect evidence

“DSI understands the ever-increasing stresses on our planet’s water resources and has the technical knowledge and comprehensive vision to help our clients minimize the impacts of…”

Source: RevenueBase Database · checked Sep 27, 2026
16Indirect evidenceTuscaloosa, AL, United StatesHQ checked Sep 27, 202611-5022 contacts →

Indirect evidence

“PELA GeoEnvironmental is an environmental consulting firm based in Tuscaloosa, Alabama, USA.”

Source: RevenueBase Database · checked Sep 27, 2026
17Partial evidenceTukwila, WA, United StatesHQ checked Sep 27, 202651-20020 contacts →

Partial evidence

“nhc is an international consulting firm of engineers and scientists providing professional services for the development, management and protection of water resources.”

Source: RevenueBase Database · checked Sep 27, 2026
18Indirect evidenceLakewood, CO, United StatesHQ checked Sep 27, 202611-5019 contacts →

Indirect evidence

“Itasca Denver, Inc.”

Source: RevenueBase Database · checked Sep 27, 2026
19Indirect evidenceReno, NV, United StatesHQ checked Sep 27, 202611-5017 contacts →

Indirect evidence

“Geologica excels in Geothermal Resource Consulting by providing high quality global geothermal resource exploration, development and assessment services for private and public…”

Source: RevenueBase Database · checked Sep 27, 2026
20Indirect evidenceTampa, FL, United StatesHQ checked Sep 27, 202611-5016 contacts →

Indirect evidence

“ASRus, LLC, was founded in 2006 to provide hydrogeological and reuse related professional services to municipal and industrial clients in Florida.”

Source: RevenueBase Database · checked Sep 27, 2026
21Indirect evidenceHope, RI, United StatesHQ checked Sep 27, 202651-20016 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026
22Partial evidenceAlameda, CA, United StatesHQ checked Sep 27, 202611-5015 contacts →

Partial evidence

“Todd Groundwater is a groundwater consulting firm specializes in the planning, development, management, and protection of groundwater and related surface water resources.”

Source: RevenueBase Database · checked Sep 27, 2026
23Indirect evidenceLakewood, CO, United StatesHQ checked Sep 27, 202611-5015 contacts →

Indirect evidence

“Firm Profile Quantum Water & Environment offers water rights, water supply, hydrogeologic, engineering, and environmental expertise to private, commercial, and governmental…”

Source: RevenueBase Database · checked Sep 27, 2026
24Partial evidenceMidland, TX, United StatesHQ checked Sep 27, 202651-20013 contacts →

Partial evidence

“Clearwater Resources is a full service water management, well drilling and pump service company serving the oil and gas industry.”

Source: RevenueBase Database · checked Sep 27, 2026
25Partial evidencePortland, OR, United StatesHQ checked Sep 27, 20261-1012 contacts →

Partial evidence

“Summit Water Resources has more than 100 years of combined experience in the development of municipal, agricultural, and industrial groundwater supply, aquifer storage and…”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 208 aquifer management consultants based in the United States

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Aquifer management consultants based in the United States at a glance

As of Sep 27, 2026
45.7%Verified-email coverage
9.5Average contacts per company
1-10Median size (employees)
4.3%Largest-city concentration · Denver
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
144
11-50
43
51-200
18
1,001-5,000
1
5,001-10,000
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 208 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among aquifer management consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “aquifer management consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names aquifer management consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among aquifer management consultants, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 902 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 27, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names aquifer management consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many aquifer management consultants are there based in the United States?

RevenueBase identified 208 aquifer management consultants headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Montgomery & Associates, headquartered in Tucson, tops this list with the largest team on record.

Which city has the most aquifer management consultants?

Denver leads with 9 headquartered companies, followed by Portland (6) and Golden (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 902 verified decision-maker contacts tracked across these 208 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.