EPA RSL/RML vs ERG for iOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
EPA RSL/RML
This app provides chemical-specific concentrations for contaminants in air, water, and soil. These levels help determine if further investigation or cleanup is needed. It is updated twice a year.
- Regional Screening Levels (RSLs)
- Removal Management Levels (RMLs)
- Chemical-specific concentrations
- Risk-based levels
- Updated twice a year
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US EPA Regional Screening Levels and Removal Management Levels The US Environmental Protection Agency Regional Screening Levels (RSLs) are chemical-specific concentrations for individual contaminants in air, drinking water and soil that, if exceeded, may warrant further investigation or site cleanup. The Regional Removal Management Levels (RMLs) are chemical-specific concentrations for individual contaminants in tap water and soil that may be used to support the decision for EPA to undertake a removal action. The RSLs and RMLs are risk-based levels, calculated using the latest toxicity values, default exposure assumptions and physical and chemical properties. They are updated twice a year. For more information, please see the RSL (https://www.epa.gov/risk/regional-screening-levels-rsls) and RML (https://www.epa.gov/risk/regional-removal-management-levels-chemicals-rmls) websites.
ERG for iOS
This app provides first responders with quick access to critical information for hazardous materials transportation incidents. It features an indexed list of dangerous goods, including ID numbers, hazards, and safety precautions, aiding in effective response.
- Indexed list of dangerous goods
- ID number lookup
- General hazard information
- Recommended safety precautions
- Multi-language support (English, French, Spanish)
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PHMSA’s Emergency Response Guidebook (ERG) is the go-to resource for first responders during the initial phase of a dangerous goods or hazardous materials transportation incident. The ERG app is a valuable companion, based on the latest edition of the ERG, to help responders quickly access critical information at their fingertips. The app features an indexed list of dangerous goods, including their associated ID number, general hazards, and recommended safety precautions. In practical scenarios, such as responding to an overturned tractor trailer displaying a DOT hazmat placard, emergency responders can use the app to quickly identify the material associated with the placard and get guidance on how to respond effectively. Full versions available in English, French, and Spanish.
Screenshots
Verdict
The clearest difference is review sentiment: ERG for iOS at 100% against EPA RSL/RML's 50%. ERG for iOS also leads on rating (4.8 vs 4.0) and ratings volume (65 vs 3). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
ERG for iOS holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: ERG for iOS has 65 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of EPA RSL/RML's written reviews are positive against 100% of ERG for iOS's.
EPA RSL/RML ships an update every 5 months, ERG for iOS every 4 months. The most recent releases landed on October 13, 2026 and October 27, 2026 respectively.
| Parameter | EPA RSL/RML | ERG for iOS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (3 ratings) | 4.8 (65 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 65 — better |
| Update frequency | Every 5 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | — | #110 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 23 MB | 27 MB |
| Age rating | 4+ | 12+ |
| Developer | United States Environmental Protection Agency (USEPA) | Pipeline and Hazardous Materials Safety Administration |
Customer experience
EPA RSL/RML
ERG for iOS
In-app purchases
EPA RSL/RML
No in-app purchases
ERG for iOS
No in-app purchases
Questions
Is EPA RSL/RML free?
Is ERG for iOS free?
Which has better reviews, EPA RSL/RML or ERG for iOS?
Do EPA RSL/RML or ERG for iOS have ads?
Which is updated more often, EPA RSL/RML or ERG for iOS?
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