Dingmans Ferry Stone Inc — NPDES permit PA0224791: limits, due date and EPA's record

Industrial or other facility, Dingmans Ferry, Pennsylvania. NPDES permit PA0224791, in force until Mar 11, 2029. Last 12 months: no values over a limit, 96 required values missing, 9 of 27 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (96)

Parameter	Statistic	Limit	Months	Outfall
Turbidity	instantaneous maximum	≤ 40 NTU	all year	SP1
Turbidity	instantaneous maximum	≤ 40 NTU	all year	SP1
pH	instantaneous minimum	≥ 6 SU	all year	SP1
pH	instantaneous minimum	≥ 6 SU	all year	SP1
pH	instantaneous maximum	≤ 9 SU	all year	SP1
pH	instantaneous maximum	≤ 9 SU	all year	SP1
pH	instantaneous minimum	≥ 6 SU	all year	SP1
pH	instantaneous minimum	≥ 6 SU	all year	SP1
pH	instantaneous maximum	≤ 9 SU	all year	SP1
pH	instantaneous maximum	≤ 9 SU	all year	SP1
pH	instantaneous minimum	≥ 6 SU	all year	SP1
pH	instantaneous minimum	≥ 6 SU	all year	SP1
pH	instantaneous maximum	≤ 9 SU	all year	SP1
pH	instantaneous maximum	≤ 9 SU	all year	SP1
Alkalinity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP1
Alkalinity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP1
Acidity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP1
Acidity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP1
Solids, total suspended	monthly average	≤ 35 mg/L	all year	SP1
Solids, total suspended	monthly average	≤ 35 mg/L	all year	SP1
Solids, total suspended	daily maximum	≤ 70 mg/L	all year	SP1
Solids, total suspended	daily maximum	≤ 70 mg/L	all year	SP1
Solids, total suspended	instantaneous maximum	≤ 90 mg/L	all year	SP1
Solids, total suspended	instantaneous maximum	≤ 90 mg/L	all year	SP1
Solids, settleable	instantaneous maximum	≤ .5 mL/L	all year	SP1
Solids, settleable	instantaneous maximum	≤ .5 mL/L	all year	SP1
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP1
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP1
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP1
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP1
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP1
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP1
Turbidity	instantaneous maximum	≤ 40 NTU	all year	SP2
Turbidity	instantaneous maximum	≤ 40 NTU	all year	SP2
pH	instantaneous minimum	≥ 6 SU	all year	SP2
pH	instantaneous minimum	≥ 6 SU	all year	SP2
pH	instantaneous maximum	≤ 9 SU	all year	SP2
pH	instantaneous maximum	≤ 9 SU	all year	SP2
pH	instantaneous minimum	≥ 6 SU	all year	SP2
pH	instantaneous minimum	≥ 6 SU	all year	SP2
pH	instantaneous maximum	≤ 9 SU	all year	SP2
pH	instantaneous maximum	≤ 9 SU	all year	SP2
pH	instantaneous minimum	≥ 6 SU	all year	SP2
pH	instantaneous minimum	≥ 6 SU	all year	SP2
pH	instantaneous maximum	≤ 9 SU	all year	SP2
pH	instantaneous maximum	≤ 9 SU	all year	SP2
Alkalinity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP2
Alkalinity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP2
Acidity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP2
Acidity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP2
Solids, total suspended	monthly average	≤ 35 mg/L	all year	SP2
Solids, total suspended	monthly average	≤ 35 mg/L	all year	SP2
Solids, total suspended	daily maximum	≤ 70 mg/L	all year	SP2
Solids, total suspended	daily maximum	≤ 70 mg/L	all year	SP2
Solids, total suspended	instantaneous maximum	≤ 90 mg/L	all year	SP2
Solids, total suspended	instantaneous maximum	≤ 90 mg/L	all year	SP2
Solids, settleable	instantaneous maximum	≤ .5 mL/L	all year	SP2
Solids, settleable	instantaneous maximum	≤ .5 mL/L	all year	SP2
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP2
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP2
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP2
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP2
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP2
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP2
Turbidity	instantaneous maximum	≤ 40 NTU	all year	SP3
Turbidity	instantaneous maximum	≤ 40 NTU	all year	SP3
pH	instantaneous minimum	≥ 6 SU	all year	SP3
pH	instantaneous minimum	≥ 6 SU	all year	SP3
pH	instantaneous maximum	≤ 9 SU	all year	SP3
pH	instantaneous maximum	≤ 9 SU	all year	SP3
pH	instantaneous minimum	≥ 6 SU	all year	SP3
pH	instantaneous minimum	≥ 6 SU	all year	SP3
pH	instantaneous maximum	≤ 9 SU	all year	SP3
pH	instantaneous maximum	≤ 9 SU	all year	SP3
pH	instantaneous minimum	≥ 6 SU	all year	SP3
pH	instantaneous minimum	≥ 6 SU	all year	SP3
pH	instantaneous maximum	≤ 9 SU	all year	SP3
pH	instantaneous maximum	≤ 9 SU	all year	SP3
Alkalinity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP3
Alkalinity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP3
Acidity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP3
Acidity, total [as CaCO3]	instantaneous maximum	report only (mg/L)	all year	SP3
Solids, total suspended	monthly average	≤ 35 mg/L	all year	SP3
Solids, total suspended	monthly average	≤ 35 mg/L	all year	SP3
Solids, total suspended	daily maximum	≤ 70 mg/L	all year	SP3
Solids, total suspended	daily maximum	≤ 70 mg/L	all year	SP3
Solids, total suspended	instantaneous maximum	≤ 90 mg/L	all year	SP3
Solids, total suspended	instantaneous maximum	≤ 90 mg/L	all year	SP3
Solids, settleable	instantaneous maximum	≤ .5 mL/L	all year	SP3
Solids, settleable	instantaneous maximum	≤ .5 mL/L	all year	SP3
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP3
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP3
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP3
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP3
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP3
Alkalinity - Acidity [as CaCO3]	instantaneous minimum	≥ 0 mg/L	all year	SP3

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/PA0224791 · MCP: https://passage-data.com/mcp