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DCP Midstream, LP Okarche Gas Plant

Natural Gas Liquids, Okarche-Cashion Division, Oklahoma. NPDES permit OK0036994, in force until Aug 31, 2031. Last 12 months: over a limit 4 times (last September 2026), 2 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form A monthly (13 values), outfall 003 form A monthly (13 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
March 2026Zinc, total [as Zn], daily maximum2.06 mg/L≤ 1 mg/L106%
April 2026Solids, total suspended, daily maximum50 mg/L≤ 45 mg/L11%
May 2026Solids, total suspended, monthly average34.5 mg/L≤ 30 mg/L15%
September 2026Solids, total suspended, daily maximum10.95 lb/d≤ 8.63 lb/d27%

Limits in force (26)

ParameterStatisticLimitMonthsOutfall
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 38.36 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Solids, total suspendeddaily maximum≤ 8.63 lb/dall year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)all year001
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year001
Zinc, total [as Zn]daily maximum≤ .19 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualinstantaneous maximum≤ .099 mg/Lall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 200 mg/Lall year003
Oxygen demand, chem. [high level] [COD]daily maximum≤ 38.36 lb/dall year003
pHminimum≥ 6.5 SUall year003
pHmaximum≤ 9 SUall year003
Solids, total suspendeddaily maximum≤ 45 mg/Lall year003
Solids, total suspendeddaily maximum≤ 8.63 lb/dall year003
Phosphorus, total [as P]daily maximumreport only (mg/L)all year003
Phosphorus, total [as P]daily maximumreport only (lb/d)all year003
Zinc, total [as Zn]daily maximum≤ 1 mg/Lall year003
Zinc, total [as Zn]daily maximum≤ .19 lb/dall year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Chlorine, total residualinstantaneous maximum≤ .099 mg/Lall year003

How strict are these limits?

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

Same industry: the 6 Oil and Gas Extraction permits in Oklahoma.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OK0036994 · MCP: https://passage-data.com/mcp