Contact

The contact reference for Waterfiltration Authority covers how to reach the directory, what geographic scope the resource addresses, and what information to include when submitting a professional inquiry or listing-related request. This page also describes the structural categories of inquiries the directory handles and the industry framework those inquiries fall within — from licensed contractor listings to regulatory compliance questions affecting water filtration service providers operating under NSF/ANSI and EPA standards.

Additional contact options

Waterfiltration Authority operates within the plumbing services vertical and maintains coordination with its parent directory network at plumbingservicesauthority.com. Inquiries that fall outside the scope of water filtration — including general plumbing licensing, backflow prevention certification outside point-of-entry filtration, or drain-line work unrelated to filtration equipment — are more appropriately directed to the parent network.

The Water Filtration Listings section of this directory is the primary reference for locating licensed professionals by service category. The Directory Purpose and Scope page defines the classification boundaries between system types covered and those outside the directory's scope — including distinctions between point-of-use (POU) systems, point-of-entry (POE) systems, and industrial-scale municipal filtration infrastructure, which is regulated separately under the Safe Drinking Water Act (SDWA) administered by the U.S. Environmental Protection Agency.

For professionals seeking to understand how listing tiers are structured or how service categories are classified within the directory, the How to Use This Water Filtration Resource page provides the relevant navigational framework.

The primary contact email for the editorial and administrative office is [email protected]. This address handles listing submissions, correction requests, and professional inquiries. Response timelines for standard inquiries are typically as processing allows.

How to reach this office

All formal correspondence directed to Waterfiltration Authority should be submitted by email to [email protected]. This is the single verified point of contact for the following inquiry categories:

1. Listing submissions — Requests to add a water filtration contractor, equipment supplier, or inspection service to the directory.
2. Listing corrections — Factual errors in an existing listing, including incorrect license numbers, outdated certification status, or inaccurate service area designations.
3. Regulatory reference updates — Notifications regarding changes to NSF/ANSI Standard 58 (reverse osmosis systems), NSF/ANSI Standard 53 (health effects reduction), or state-level plumbing code amendments affecting listed professionals.
4. Professional credential inquiries — Questions regarding what licensing documentation, certifications, or permits are referenced in directory listings.
5. Research and press inquiries — Requests for industry data, category definitions, or sector classification information for publication or institutional research purposes.

Telephone contact is not available for this directory resource. All inquiries must be submitted in writing to ensure accurate routing and documentation. Submissions that do not follow the structured format described in the final section of this page may experience delays in processing.

Service area covered

Waterfiltration Authority operates at national scope across all 50 U.S. states. The directory indexes water filtration service providers operating under state-level plumbing contractor licensing requirements, which vary by jurisdiction. As of the most recent licensing framework surveys published by the Contractors State License Board (CSLB) in California and equivalent bodies in Texas (Texas State Board of Plumbing Examiners) and Florida (Florida Department of Business and Professional Regulation), state licensing requirements for water treatment and filtration work differ in 3 primary dimensions: examination requirements, continuing education mandates, and scope-of-work definitions for filtration versus general plumbing.

The directory covers 4 primary service categories at the national level:

• Residential POU and POE filtration — Whole-house and under-sink systems certified under NSF/ANSI standards 42, 53, and 58.
• Commercial water treatment — Systems serving commercial buildings, subject to state plumbing code and in some jurisdictions, local health department permitting.
• Well water and private supply filtration — Systems serving private wells not regulated under SDWA municipal requirements but subject to EPA secondary standards and state well codes.
• Industrial pre-treatment filtration — Pre-treatment systems upstream of industrial processes, regulated under EPA Clean Water Act discharge requirements where applicable.

States that have adopted the Uniform Plumbing Code (UPC), published by the International Association of Plumbing and Mechanical Officials (IAPMO), have different installation inspection requirements than states operating under the International Plumbing Code (IPC), published by the International Code Council (ICC). Both frameworks govern filtration system installation as a plumbing trade activity requiring permits in most jurisdictions.

What to include in your message

Incomplete submissions are the single most common reason for delayed processing. The following structured breakdown represents the minimum required information for each inquiry type.

For listing submissions:
1. Business or contractor legal name as registered with the applicable state licensing board.
2. State license number and issuing authority (e.g., Texas State Board of Plumbing Examiners license number).
3. NSF/ANSI product certifications held, if applicable, including the certifying body (NSF International, UL, or Water Quality Association).
4. Primary service counties or metropolitan statistical areas (MSAs) served.
5. System categories serviced — specify POU, POE, well water, or commercial.

For listing corrections:
1. The specific listing name and any identifier visible in the directory.
2. The field containing the error and the correct replacement information.
3. Supporting documentation reference — for example, a state licensing board URL confirming the corrected license status.

For regulatory reference updates:
1. The specific standard, code section, or statute affected (e.g., NSF/ANSI 58 revision, IRC Section P2902, or a named state code amendment).
2. The issuing body and publication or effective date of the change.
3. A link or citation to the official source document.

Submissions that include documentation references — such as a direct link to a state licensing board record or an NSF Certified Product Listing entry — are processed more efficiently than submissions relying solely on self-reported information. The directory cross-references professional credentials against public licensing databases where available before publishing or amending any listing.