Passage Data · Check a report · Use it from your AI

Chemtrade Refinery Services Inc.

Industrial Inorganic Chemicals, Tulsa, Oklahoma. NPDES permit OK0036439, in force until Mar 31, 2031. Last 12 months: over a limit 4 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A monthly (14 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 4 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period ending	Parameter	Reported	Limit	Over by
November 2025	Sulfate, total [as SO4], daily maximum	905 mg/L	≤ 780 mg/L	16%
August 2026	pH, minimum	5.98 SU	≥ 6 SU	—
September 2026	Sulfate, total [as SO4], daily maximum	1290 mg/L	≤ 1012 mg/L	27%
September 2026	Sulfate, total [as SO4], daily maximum	1982.85 lb/d	≤ 884 lb/d	124%

Limits in force (14)

Parameter	Statistic	Limit	Months
BOD, 5-day, 20 deg. C	monthly average	report only (mg/L)	all year
BOD, 5-day, 20 deg. C	daily maximum	report only (mg/L)	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	report only (mg/L)	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Solids, total suspended	daily maximum	≤ 39.31 lb/d	all year
Sulfate, total [as SO4]	monthly average	≤ 736 mg/L	all year
Sulfate, total [as SO4]	daily maximum	≤ 1012 mg/L	all year
Sulfate, total [as SO4]	monthly average	≤ 643 lb/d	all year
Sulfate, total [as SO4]	daily maximum	≤ 884 lb/d	all year
Oxidants, total residual	instantaneous maximum	≤ .099 mg/L	all year
Flow, in conduit or thru treatment plant	monthly average	report only (gal/d)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (gal/d)	all year

How strict are these limits?

Sulfate, total [as SO4], daily maximum 1012 mg/L — stricter than 72% of 280 other minor industrial and other permits nationwide
Sulfate, total [as SO4], monthly average 736 mg/L — stricter than 50% of 52 other minor industrial and other permits nationwide
Solids, total suspended, daily maximum 45 mg/L — stricter than 14% of 104 other minor industrial and other permits in Oklahoma; 35% have the same limit

Cited limits by parameter: Oklahoma's rules and the federal ones.

Same industry: the 11 Chemicals and Allied Products permits in Oklahoma.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0036439 · MCP: https://passage-data.com/mcp