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Leonardite Products, LLC

Industrial or other facility, Williston, North Dakota. NPDES permit ND0025283, in force until Mar 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: form A twice a year (22 values)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 2 reports late

Limits in force (22)

ParameterStatisticLimitMonths
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedminimumreport only (mg/L)all year
Solids, total suspendedmonthly average≤ 35 mg/Lall year
Solids, total suspendeddaily maximum≤ 70 mg/Lall year
Solids, settleableminimumreport only (mL/L)all year
Solids, settleablemonthly averagereport only (mL/L)all year
Solids, settleabledaily maximum≤ .5 mL/Lall year
Oil & Greasedaily minimumreport only (mg/L)all year
Oil & Greasemonthly averagereport only (mg/L)all year
Oil & Greasedaily maximum≤ 10 mg/Lall year
Iron, total [as Fe]minimumreport only (mg/L)all year
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year
Manganese, total [as Mn]minimumreport only (mg/L)all year
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year
Durationtotalreport only (d/mo) (alert, not enforceable)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, totaltotalreport only (Mgal)all year
Oil and grease visualtotalreport only (N=0;Y=1)all year

How strict are these limits?

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

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ND0025283 · MCP: https://passage-data.com/mcp