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

W.R. Grace & Co. -Conn. Grace Davidson Div

Industrial Inorganic Chemicals, East Chicago, Indiana. NPDES permit IN0000329, in force until Nov 30, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 29 days after each period: form A monthly (25 values)
Renewal application due
Jun 3, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 1 of 14 reports late

Limits in force (30)

ParameterStatisticLimitMonths
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 170 mg/Lall year
Solids, total suspendeddaily maximum≤ 254 mg/Lall year
Solids, total suspendedmonthly average≤ 600 lb/dall year
Solids, total suspendeddaily maximum≤ 900 lb/dall year
Sulfate, total [as SO4]monthly average≤ 11024 mg/Lall year
Sulfate, total [as SO4]daily maximum≤ 14698 mg/Lall year
Sulfate, total [as SO4]monthly average≤ 39000 lb/dall year
Sulfate, total [as SO4]daily maximum≤ 52000 lb/dall 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
Chlorine, total residualmonthly average≤ .0078 mg/Lall year
Chlorine, total residualdaily maximum< .06 mg/Lall year
Chlorine, total residualmonthly average≤ .03 lb/dall year
Chlorine, total residualdaily maximum< .3 lb/dall year
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 9.4 tox acuteNov
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 9.4 tox acuteDec
Toxicity [acute], Ceriodaphnia dubiamaximum≤ 9.4 tox acuteDec
Solids, total dissolvedmonthly average≤ 18938 mg/Lall year
Solids, total dissolveddaily maximum≤ 26570 mg/Lall year
Solids, total dissolvedmonthly average≤ 67000 lb/dall year
Solids, total dissolveddaily maximum≤ 94000 lb/dall year
Mercury, total recoverablerolling average≤ 7.8 ng/LFeb, Apr, Jun, Aug, Oct, Dec
Mercury, total recoverabledaily maximumreport only (ng/L)Feb, Apr, Jun, Aug, Oct, Dec
Chemical Oxygen Demand [COD]monthly averagereport only (mg/L)all year
Chemical Oxygen Demand [COD]daily maximumreport only (mg/L)all year
Chemical Oxygen Demand [COD]monthly averagereport only (lb/d)all year
Chemical Oxygen Demand [COD]daily maximumreport only (lb/d)all year
Flow, totalmonthly totalreport only (Mgal/mo)all year

How strict are these limits?

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

Same industry: the 45 Chemicals and Allied Products permits in Indiana.

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/IN0000329 · MCP: https://passage-data.com/mcp