40 CFR § 434.35 - New source performance standards (NSPS).

---
identifier: "/us/cfr/t40/s434.35"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 434.35 - New source performance standards (NSPS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "434.35"
section_name: "New source performance standards (NSPS)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "434"
part_name: "COAL MINING POINT SOURCE CATEGORY BPT, BAT, BCT LIMITATIONS AND NEW SOURCE PERFORMANCE STANDARDS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311 1314(b), (c), (e), and (g), 1316(b) and (c), 1317(b) and (c), and 1361."
regulatory_source: "50 FR 41305, Oct. 9, 1985, unless otherwise noted."
cfr_part: "434"
---


# 434.35 New source performance standards (NSPS).

Except as provided in 40 CFR 401.17, and §§ 434.61, 434.62 and 434.63 of this part, the following new source performance standards shall be achieved for any discharge from a new source subject to this subpart:

NSPS Effluent Limitations

| Pollutant or pollutant property | Maximum for any 1 day | Average of daily values for 30 consecutive days |
| --- | --- | --- |
|  | Concentration in mg/l |  |
| Iron, total | 6.0 | 3.0 |
| Manganese, total | 4.0 | 2.0 |
| TSS | 70.0 | 35.0 |
| pH | () | () |
| Within the range 6.0 to 9.0 at all times. |  |  |