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§ 425.45 Pretreatment standards for existing sources (PSES).

40 CFR 425.45

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  3. Title 40
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  9. Subpart D
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  11. 40 CFR 425.45
Citation40 CFR 425.45
CorpusDaily eCFR
Displayed edition2026-05-14
Last updated2026-05-14

§ 425.45 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403, and achieve the following pretreatment standards:

Pollutant or pollutant propertyPSES
Maximum for any 1 dayMaximum for monthly average
Milligrams per liter (mg/l)
Total Chromium1912
pH(1)(1)
1 Within the range 6.0 to 10.0.