Comparison

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.

Head to head
About

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.

Highlights
  • Regional Screening Levels (RSLs)
  • Removal Management Levels (RMLs)
  • Chemical-specific concentrations
  • Risk-based levels
  • Updated twice a year
Features
Read full description

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.

About

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.

Highlights
  • Indexed list of dangerous goods
  • ID number lookup
  • General hazard information
  • Recommended safety precautions
  • Multi-language support (English, French, Spanish)
Features
Currently charting
Read full description

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

EPA RSL/RML4 screens
ERG for iOS4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 7 level
EPA RSL/RML versus ERG for iOS: the parameters behind the verdict, then further details
ParameterEPA RSL/RMLERG for iOS
PriceFreeFree
Rating4.0 (3 ratings)4.8 (65 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings365 — better
Update frequencyEvery 5 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank—#110 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size23 MB27 MB
Age rating4+12+
DeveloperUnited States Environmental Protection Agency (USEPA)Pipeline and Hazardous Materials Safety Administration

Customer experience

EPA RSL/RML

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

ERG for iOS

All ratings64 ratings
Positive95.3%
Neutral3.1%
Negative1.6%
Written reviews13 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EPA RSL/RML

No in-app purchases

None

ERG for iOS

No in-app purchases

Questions

Is EPA RSL/RML free?
EPA RSL/RML is free to download, with no in-app purchases.
Is ERG for iOS free?
ERG for iOS is free to download, with no in-app purchases.
Which has better reviews, EPA RSL/RML or ERG for iOS?
ERG for iOS is rated higher. EPA RSL/RML averages 4.0 out of 5 from 3 ratings, while ERG for iOS averages 4.8 from 65 ratings.
Do EPA RSL/RML or ERG for iOS have ads?
Neither EPA RSL/RML nor ERG for iOS shows ads.
Which is updated more often, EPA RSL/RML or ERG for iOS?
EPA RSL/RML ships an update every 5 months, and ERG for iOS every 4 months. Most recently, EPA RSL/RML was updated on October 13, 2026 and ERG for iOS on October 27, 2026.

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