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

US Silica Co

Industrial or other facility, Mill Creek, Pennsylvania. NPDES permit PA0279340, in force until May 18, 2030. Last 12 months: no values over a limit, 96 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 003A form A quarterly (32 values), outfall 005A form A quarterly (32 values), outfall 004A form Y yearly
Last report on file
March 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 18 of 32 reports late

Limits in force (65)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year003A
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year003A
Specific conductanceinstantaneous maximumreport only (umho/cm)all year003A
Specific conductanceinstantaneous maximumreport only (umho/cm)all year003A
pHinstantaneous minimum≥ 6 SUall year003A
pHinstantaneous minimum≥ 6 SUall year003A
pHinstantaneous maximum≤ 9 SUall year003A
pHinstantaneous maximum≤ 9 SUall year003A
Solids, total suspendedmonthly average≤ 35 mg/Lall year003A
Solids, total suspendedmonthly average≤ 35 mg/Lall year003A
Solids, total suspendeddaily maximum≤ 70 mg/Lall year003A
Solids, total suspendeddaily maximum≤ 70 mg/Lall year003A
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year003A
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year003A
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year003A
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year003A
Iron, total [as Fe]monthly average≤ 2 mg/Lall year003A
Iron, total [as Fe]monthly average≤ 2 mg/Lall year003A
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year003A
Iron, total [as Fe]daily maximum≤ 4 mg/Lall year003A
Iron, total [as Fe]instantaneous maximum≤ 5 mg/Lall year003A
Iron, total [as Fe]instantaneous maximum≤ 5 mg/Lall year003A
Manganese, total [as Mn]instantaneous maximumreport only (mg/L)all year003A
Manganese, total [as Mn]instantaneous maximumreport only (mg/L)all year003A
Aluminum, total [as Al]monthly average≤ .75 mg/Lall year003A
Aluminum, total [as Al]monthly average≤ .75 mg/Lall year003A
Aluminum, total [as Al]daily maximum≤ 1.5 mg/Lall year003A
Aluminum, total [as Al]daily maximum≤ 1.5 mg/Lall year003A
Aluminum, total [as Al]instantaneous maximum≤ 1.8 mg/Lall year003A
Aluminum, total [as Al]instantaneous maximum≤ 1.8 mg/Lall year003A
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (cfs)all year003A
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (cfs)all year003A
Flow, in conduit or thru treatment plantinstantaneous maximum≤ 0 cfsall year004A
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year005A
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year005A
Specific conductanceinstantaneous maximumreport only (umho/cm)all year005A
Specific conductanceinstantaneous maximumreport only (umho/cm)all year005A
pHinstantaneous minimum≥ 6 SUall year005A
pHinstantaneous minimum≥ 6 SUall year005A
pHinstantaneous maximum≤ 9 SUall year005A
pHinstantaneous maximum≤ 9 SUall year005A
Solids, total suspendedmonthly average≤ 35 mg/Lall year005A
Solids, total suspendedmonthly average≤ 35 mg/Lall year005A
Solids, total suspendeddaily maximum≤ 70 mg/Lall year005A
Solids, total suspendeddaily maximum≤ 70 mg/Lall year005A
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year005A
Solids, total suspendedinstantaneous maximum≤ 90 mg/Lall year005A
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year005A
Sulfate, total [as SO4]instantaneous maximumreport only (mg/L)all year005A
Iron, total [as Fe]monthly average≤ 2.4 mg/Lall year005A
Iron, total [as Fe]monthly average≤ 2.4 mg/Lall year005A
Iron, total [as Fe]daily maximum≤ 4.8 mg/Lall year005A
Iron, total [as Fe]daily maximum≤ 4.8 mg/Lall year005A
Iron, total [as Fe]instantaneous maximum≤ 6 mg/Lall year005A
Iron, total [as Fe]instantaneous maximum≤ 6 mg/Lall year005A
Manganese, total [as Mn]instantaneous maximumreport only (mg/L)all year005A
Manganese, total [as Mn]instantaneous maximumreport only (mg/L)all year005A
Aluminum, total [as Al]monthly average≤ .76 mg/Lall year005A
Aluminum, total [as Al]monthly average≤ .76 mg/Lall year005A
Aluminum, total [as Al]daily maximum≤ 1.5 mg/Lall year005A
Aluminum, total [as Al]daily maximum≤ 1.5 mg/Lall year005A
Aluminum, total [as Al]instantaneous maximum≤ 1.9 mg/Lall year005A
Aluminum, total [as Al]instantaneous maximum≤ 1.9 mg/Lall year005A
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (cfs)all year005A
Flow, in conduit or thru treatment plantinstantaneous maximumreport only (cfs)all year005A

How strict are these limits?

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

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/PA0279340 · MCP: https://passage-data.com/mcp