U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

  • Environmental Topics
  • Laws & Regulations
  • Report a Violation
  • About EPA
    HERO
  • About
    FAQ Risk Assessment Transparency & Integrity Contact Us Report an Issue
  • Browse
    Search HERO Projects
  • Login
  1. Home
  2. Projects

Please check your network connection and refresh this page

HERO Projects

208

total HERO projects

61

OPPT REs projects

56

IRIS projects

34

PFAS projects

22

Other projects

17

NAAQS projects

10

OPPT projects

3

OW - HHRAB projects

2

PPRTV projects

1

TRI Other projects

1

STPC projects

1

IRIS Legacy projects

 
Search by name or CASRN
×
Filter by Project category

208 items found. Displaying 25 items on page 1 of 9.

    PFAS
    5:3 acid (PFAS)
    PFAS
    6:2/8:2 diPAP (PFAS)
    PFAS
    6:2 diPAP (PFAS)
    PFAS
    6:2 Fluorotelomer sulfonic acid (PFAS)
    PFAS
    6:2 monoPAP (PFAS)
    PFAS
    8:2 diPAP (PFAS)
    PFAS
    8:2 monoPAP (PFAS)
    PFAS
    Additional PFAS (formerly XAgency) (PFAS)
    PFAS
    ADONA (PFAS)
    Other
    Alaska Waste and Health Impacts (Other)
    OPPT REs
    All TSCA Risk Evaluations - Draft & Final (OPPT REs)
    IRIS
    Ammonia (IRIS)
    IRIS
    Ammonia, Oral - Problem Formulation (IRIS)
    IRIS
    tert-Amyl ethyl ether (TAEE) (IRIS)
    IRIS
    tert-Amyl methyl ether (TAME) (IRIS)
    IRIS
    Arsenic (Inorganic) (IRIS)
    IRIS
    Arsenic MOA (IRIS)
    IRIS
    Arsenic Susceptibility (IRIS)
    IRIS
    Asbestos (IRIS)
    Other
    Atrazine SAP 2023 (Other)
    IRIS
    BBP (Butyl benzyl phthalate) (IRIS)
    IRIS
    Benzo(a)pyrene (BaP) (IRIS)
    IRIS
    Biphenyl (IRIS)
    IRIS
    n-Butanol (IRIS)
    IRIS
    tert-Butanol (IRIS)
  • <<
  • 1 of 9
  • >>
Contact Us for questions about HERO. Got feedback? Report an Issue here.
Last updated on October 21, 2025
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshots
  • Grants
  • No FEAR Act Data
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data.gov Exit EPA's Website
  • Inspector General
  • Jobs
  • Newsroom
  • Open Government
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.