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E.C. Rowlett Construction, Co., Inc.

Crushed And Broken Stone, North Little Rock, Arkansas. NPDES permit AR0046868 expired Nov 30, 2025; its limits still apply. Last 12 months: no values over a limit, 66 required values missing, 10 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 25 days after each period: form A monthly (11 values)
Last report on file: August 2026
Oct 2024 – Sep 2025: 1 value over a limit, 11 required values missing, 11 of 12 reports late

Limits in force (11)

Parameter	Statistic	Limit	Months
Oxygen, dissolved [DO]	instantaneous minimum	≥ 2 mg/L	all year
Oxygen demand, chem. [low level] [COD]	monthly average	≤ 50 mg/L	all year
Oxygen demand, chem. [low level] [COD]	daily maximum	≤ 75 mg/L	all year
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 15 mg/L	all year
Solids, total suspended	daily maximum	≤ 22.5 mg/L	all year
Oil & Grease	monthly average	≤ 10 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year

How strict are these limits?

Solids, total suspended, daily maximum 22.5 mg/L — stricter than 68% of 310 other minor industrial and other permits in Arkansas; 31% have the same limit
Solids, total suspended, monthly average 15 mg/L — stricter than 67% of 303 other minor industrial and other permits in Arkansas; 32% have the same limit
Oxygen demand, chem. [low level] [COD], daily maximum 75 mg/L — stricter than 13% of 84 other minor industrial and other permits in Arkansas; 86% have the same limit

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

Same industry: the 30 Mining and Quarrying of Nonmetallic Minerals permits in Arkansas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0046868 · MCP: https://passage-data.com/mcp