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

Union Sanitary District

Sewage treatment plant, Union City, California. NPDES permit CA0038733 expired Nov 30, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: form DF twice a year (8 values), form A twice a year, form Y twice a year
Last report on file
April 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 17 reports late

Limits in force (46)

ParameterStatisticLimitMonths
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximumreport only (deg C)all year
pHminimum≥ 6.5 SUall year
pHminimum≥ 6.5 SUall year
pHminimum≥ 6.5 SUall year
pHminimum≥ 6.5 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
pHmaximum≤ 8.5 SUall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Lead, total recoverablemonthly average≤ 3.4 ug/Lall year
Lead, total recoverablemonthly average≤ 3.4 ug/Lall year
Lead, total recoverabledaily maximum≤ 7.1 ug/Lall year
Lead, total recoverabledaily maximum≤ 7.1 ug/Lall year
Copper, total recoverablemonthly average≤ 11 ug/Lall year
Copper, total recoverablemonthly average≤ 11 ug/Lall year
Copper, total recoverabledaily maximum≤ 16 ug/Lall year
Copper, total recoverabledaily maximum≤ 16 ug/Lall year
Oil and greasedaily maximum≤ 20 mg/Lall year
Oil and greasedaily maximum≤ 20 mg/Lall year
Chlorine, total residual1-hour average≤ .019 mg/Lall year
Chlorine, total residual1-hour average≤ .019 mg/Lall year
Chlorine, total residual1-hour average≤ .019 mg/Lall year
Chlorine, total residual1-hour average≤ .019 mg/Lall year
E. colidaily maximum≤ 320 CFU/100mLall year
E. colidaily maximum≤ 320 CFU/100mLall year
E. colidaily maximum≤ 320 CFU/100mLall year
E. colidaily maximum≤ 320 CFU/100mLall year
Volume, totaltotalreport only (gal)all year
Volume, totaltotalreport only (gal)all year
Volume, totaltotalreport only (gal)all year
Volume, totaltotalreport only (gal)all year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 40 mg/Lall year
Duration of dischargetotalreport only (hr)all year
Duration of dischargetotalreport only (hr)all year
Duration of dischargetotalreport only (hr)all year
Duration of dischargetotalreport only (hr)all year

How strict are these limits?

Cited limits by parameter: California'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/CA0038733 · MCP: https://passage-data.com/mcp