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Gem City Chemicals, Incorporated

Chemicals & Allied Products, Dayton, Ohio. NPDES permit OH0108987, in force until Jan 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (26 values), outfall 002 form A monthly (2 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 1 of 21 reports late

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Toluenemonthly average≤ 5 ug/Lall year001
Toluenedaily maximum≤ 10 ug/Lall year001
Toluenemonthly average≤ .00818 kg/dall year001
Toluenedaily maximum≤ .0164 kg/dall year001
Tetrachloroethylenemonthly average≤ 5 ug/Lall year001
Tetrachloroethylenedaily maximum≤ 10 ug/Lall year001
Tetrachloroethylenemonthly average≤ .00818 kg/dall year001
Tetrachloroethylenedaily maximum≤ .0164 kg/dall year001
1,1,2-Trichloroethanemonthly average≤ 5 ug/Lall year001
1,1,2-Trichloroethanedaily maximum≤ 10 ug/Lall year001
1,1,2-Trichloroethanemonthly average≤ .00818 kg/dall year001
1,1,2-Trichloroethanedaily maximum≤ .0164 kg/dall year001
Trichloroethylenemonthly average≤ 5 ug/Lall year001
Trichloroethylenedaily maximum≤ 10 ug/Lall year001
Trichloroethylenemonthly average≤ .00818 kg/dall year001
Trichloroethylenedaily maximum≤ .0164 kg/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
Solids, total dissolved- 180 deg. Cmonthly averagereport only (mg/L)all year001
Solids, total dissolved- 180 deg. Cdaily maximumreport only (mg/L)all year001
cis-1,2-Dichloroethylenemonthly average≤ 5 ug/Lall year001
cis-1,2-Dichloroethylenedaily maximum≤ 10 ug/Lall year001
cis-1,2-Dichloroethylenemonthly average≤ .00818 kg/dall year001
cis-1,2-Dichloroethylenedaily maximum≤ .0164 kg/dall year001
Flow ratemonthly averagereport only (gal/d)all year002
Flow ratedaily maximumreport only (gal/d)all year002
pHdaily minimum≥ 6.5 SUMar, Jun, Aug, Dec002
pHdaily maximum≤ 9 SUMar, Jun, Aug, Dec002
Residue, tot fltrble [dried at 105 C]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Residue, tot fltrble [dried at 105 C]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Solids, total suspendedmonthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Solids, total suspendeddaily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Oil and grease [soxhlet extr.] tot.monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Oil and grease [soxhlet extr.] tot.daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Phosphorus, total [as P]monthly averagereport only (mg/L)Mar, Jun, Aug, Dec002
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Aug, Dec002
Aluminum, total recoverablemonthly averagereport only (ug/L)Mar, Jun, Aug, Dec002
Aluminum, total recoverabledaily maximumreport only (ug/L)Mar, Jun, Aug, Dec002

How strict are these limits?

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

Same industry: the 61 Wholesale Trade — Nondurable Goods permits in Ohio.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OH0108987 · MCP: https://passage-data.com/mcp