Company lists · Data refreshed September 2026
Top 25 Outdoor water management consultants based in the United States
RevenueBase identified 1,664 outdoor water management consultants headquartered in the United States as of September 2026 and tracks 14,979 professional contacts across them, including 6,233 with verified work emails. Houston is the largest hub.
This list covers outdoor water 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 29, 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.
The 25 largest outdoor water management consultants based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,100 contacts → | ||||
Indirect evidence “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 371 contacts → | ||||
Partial evidence “HRG assists with the planning, design, and management of community infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 235 contacts → | ||||
Indirect evidence “Down To Earth Landscape & Irrigation specializes in large-scale commercial, residential, and resort services for lawns, landscapes, and golf courses.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 212 contacts → | ||||
Partial evidence “Bland Landscaping is a regional, private equity backed, Commercial and Estate Landscape Management and Contracting business headquartered in Apex, NC.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 208 contacts → | ||||
Indirect evidence “Marina Landscape is one of the most acclaimed and successful landscape contractors in the United States today, providing state-of-the-art commercial landscaping services to both…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 204 contacts → | ||||
Indirect evidence “The name Monarch Landscape Companies may be new, but its tradition and commitment to successful landscaping outcomes is time-honored.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 179 contacts → | ||||
Indirect evidence “With over 40 years of experience, Maldonado Nursery and Landscaping is one of the largest privately owned landscape and irrigation contractors in the state of Texas.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 161 contacts → | ||||
Indirect evidence “Landscape, an Underwood Brothers Company, is a company that specializes in providing commercial landscaping services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 145 contacts → | ||||
Indirect evidence “The Bruce Company provides landscape products and landscape services for both residential and commercial clients.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 136 contacts → | ||||
Strong evidence “AQUALIS is the national leader in water management, compliance and engineering, helping businesses meet complex water regulations while protecting long-term infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 130 contacts → | ||||
Indirect evidence “David J.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 126 contacts → | ||||
Strong evidence “CMS Environmental Solutions is a stormwater compliance consultant providing NOI permitting, development, dewatering planning, site inspections, and custom stormwater management…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 114 contacts → | ||||
Indirect evidence “Maintaining the Beauty and Function of the Urban Landscape" Starting with $60 and a borrowed truck, George O’Connell and his brother Michael established O’Connell Landscape…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 112 contacts → | ||||
Indirect evidence “StormTrap offers proven, leading-edge solutions for managing runoff, protecting waterways and improving the use of your property.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 112 contacts → | ||||
Partial evidence “Weathermatic is a leading provider of water-conserving technology and services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 101 contacts → | ||||
Partial evidence “Today, Jones & Henry Engineers, Ltd, continues to provide high quality consulting services in water, wastewater, storm water, and civil engineering to municipalities and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 100 contacts → | ||||
Indirect evidence “Gachina is a family-owned, women-owned and minority-owned business.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 99 contacts → | ||||
Indirect evidence “Trees, plants and hardscapes play a vital role in beautifying your property.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 98 contacts → | ||||
Indirect evidence “Down To Earth Landscaping has been providing high quality landscape services to New Jersey, DC, Pennsylvania, Maryland and Virginia since 1986.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 94 contacts → | ||||
Partial evidence “LRE Water is now Spheros Environmental.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 89 contacts → | ||||
Partial evidence “LMC was incorporated as a landscape management contractor in April of 1980.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 86 contacts → | ||||
Indirect evidence “Mission Landscape Companies are award winning, and one of the largest integrated professional landscape firms in the United States.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 83 contacts → | ||||
Indirect evidence “We Specialize In Drip/Micro Irrigation, Solid-Set Sprinkler Systems, Filtration, Automated Systems, Controlled Environment Agriculture, Concrete, Electrical And Pump Stations.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 79 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 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 76 contacts → | ||||
Indirect evidence “Miller Legg is a statewide award-winning consulting firm that brings together the elements of engineering, planning, landscape architecture and urban design, surveying…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: outdoor water management consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names outdoor water management consultants.
- Partial evidence
- Its own public description names part of outdoor water management consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name outdoor water management consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,664 outdoor water management consultants based in the United States
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Outdoor water management consultants based in the United States at a glance
As of Sep 29, 2026Companies by employee count
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 1,664 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 outdoor water 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 “outdoor water 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 outdoor water 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 outdoor water 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, 6,233 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 29, 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.
Outdoor water management consultants by metro
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 outdoor water 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 outdoor water management consultants are there based in the United States?
RevenueBase identified 1,664 outdoor water 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?
Hazen And Sawyer, headquartered in New York, tops this list with the largest team on record.
Which city has the most outdoor water management consultants?
Houston leads with 29 headquartered companies, followed by Austin (19) and Dallas (17).
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 6,233 verified decision-maker contacts tracked across these 1,664 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 29, 2026.
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Outdoor water management consultants by geography
- Outdoor water management consultants based in Houston, United States
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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.
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