Talk:United States vehicle emission standards

Merge

Low and ultra low emission vehicles, an international issue, must not be merged into US emission standard. Pol098 (talk) 15:22, 24 June 2008 (UTC)

Would it be possible get some actual values of the emission standards on this page? —Preceding unsigned comment added by 84.72.191.106 (talk) 10:50, 18 June 2009 (UTC)

I would like to see a table of all emission standards, the actual values as mentioned above, and have then listed in rank from lowest pollution to highest. Future standards can be placed on here with an effective date column --Chicknfood (talk) 22:54, 25 May 2010 (UTC)

Locomotive emission standards

U.S. locomotive emission standards for Tiers 1, 2 and beyond are needed here too. List of low emissions locomotives links here, but there's currently no mention of those standards here. — Wdfarmer (talk) 12:42, 26 December 2009 (UTC)

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Unexplained units used

The most important thing on an article about emission standards is the measure of them. The article reads "The limits are defined in grams per mile (g/mi).", but then uses "mpg". What is "mpg"? Wikipedia provides no adequate result for this term either. — Preceding unsigned comment added by 193.144.37.42 (talk) 18:22, 27 April 2018 (UTC)

You are correct to point this out. Many people don't know that "mpg" means "miles per gallon." BeenAroundAWhile (talk) 04:39, 13 May 2018 (UTC)

Which emissions standards do U.S. territories follow?

Do Puerto Rico, Guam, CNMI, USVI, and the Samoa that belong to the U.S. also follow the EPA or California standards? Shouldn't they also be included on here as well? sion8 ^{talk page} 07:20, 23 September 2019 (UTC)

Scope of article

There are many air pollution standards not covered by this article; I think it should be renamed United States vehicle emission standards to reflect the contents. Anything not related to vehicles can be summarized on Air pollution in the United States and detail articles linked from there. -- Beland (talk) 02:16, 27 February 2020 (UTC)

Under construction explanation

I am working to rework this article a bit.

• I am going to separate the history (legislation and executive/regulatory actions) from the actual emissions. This is mostly how best to address the whole mess that the Trump administration has done over the last couple of years and to reflect the lawsuits just filed today. (eg [23])
• A section on the actual standards (explaining Tier I, Tier II, Tier III, the bins, the other programs, application to light-weight, heavy-weight, off-road, etc. as well as hoping to make a table and/or graph something like [24] but current, and adding some graphs to help here. Having the history separated off to prepare this section helps to explain this better.
• A section on any major lawsuits related to vehicle emissions if there are any.

This may take a couple days, as I'm also working on the sourcing better. --Masem (t) 01:06, 28 May 2020 (UTC)

Table

Should the table have a column indicating which states use California standards? Gah4 (talk) 03:04, 28 May 2020 (UTC)

used as best I understand under the new March 2020 rule from Trump, those are out the door, but yes, we should have such a table or a list at least, possibly with year of when they aligned with CA. --Masem (t) 03:07, 28 May 2020 (UTC)

I haven't tried to follow what Trump has done. As well as I know, it is still WA state law, until someone sues someone else. Gah4 (talk) 03:36, 28 May 2020 (UTC)

Thats why I need to update this. I do know that CA and 23 other states have sued the administration due to denying CA's waiver to the CAA in Sept 2019 and as of yesterday, a separate suit for a change in the fuel efficiency standards from March 2020. This page did not capture well what pre-2019 the CA standards/CAA waiver and effect on other states were but that definitely should be documented (even if its off the table) but that's definitely a thing to add. --Masem (t) 16:39, 28 May 2020 (UTC)

Leaving this link here for a reference [25] to use for this table. --Masem (t) 02:25, 30 May 2020 (UTC)

The early steps of emission standards

I just ask to probably add some facts about the first steps of emission standards. As mentioned in the east-german journal Kraftfahrzeugtechnik (1965, May, p. 168-170), even before 1963 there was an assembly bill 5. april 1960 including exhaustion standards, written by California Board of Health; Department of Public Health - execution should be done by MVPCB (Motor Vehicle Pollution Control Board). More literature: Hass, G.C.: California explains its New Exhaust Standard. SAE-Journal 1960, Sept., p. 34-37. (I didn't get this). Best regards from Berlin --Max schwalbe (talk) 12:55, 30 December 2020 (UTC)

clarify whether this article is about standards for Mfr's or Consumers

make it clear whether this is about manufacturing standards, or vehicle owner emission test compliance standards. This is not at all clear in the article.

the first is manufacturing to a standard. the second is when car owners go to the DEQ test station to get a smog test, which must pass certain standards.
. So make it clear what these standards and discussion are about. Is it about pre-market manufacturing standards or consumer car owner maintenance standards for emissions at smog test time. Meat Eating Orchid (talk) 00:32, 27 November 2022 (UTC)

First sentence of the second paragraph of the lede is clear "In nearly all cases, these agencies set standards that are expected to be met on a fleet-wide basis from automobile and other vehicle manufacturers, with states delegated to enforce those standards but not allowed to set stricter requirements." Vehicle testing is covered in a separate article though touched on just a bit here. --Masem (t) 00:48, 27 November 2022 (UTC)