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Buena Vista Rancheria of Me-Wuk Indians

Sewage treatment plant, Ione, California. NPDES permit CA0049675 expired Feb 28, 2026; its limits still apply. Last 12 months: over a limit 8 times (last July 2026), 4 of 43 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A quarterly (80 values), outfall 001D form RW quarterly (18 values), outfall 001U form RW quarterly (18 values), outfall INF form A quarterly (4 values), outfall 001 form Y yearly
Last report on file
July 2026
Oct 2024 – Sep 2025
15 values over a limit, 19 required values missing, 9 of 49 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingOutfallParameterReportedLimitOver by
October 2025001Temperature, water deg. centigrade, daily maximum25.2 deg C≤ 23 deg C10%
October 2025001DOxygen, dissolved [DO], daily minimum6.92 mg/L≥ 7 mg/L1%
March 2026001Temperature, water deg. centigrade, daily maximum23.3 deg C≤ 23 deg C1%
May 2026001Temperature, water deg. centigrade, daily maximum24.5 deg C≤ 23 deg C7%
June 2026001Temperature, water deg. centigrade, daily maximum28.1 deg C≤ 23 deg C22%
June 2026001DOxygen, dissolved [DO], daily minimum6.61 mg/L≥ 7 mg/L6%
July 2026001Temperature, water deg. centigrade, daily maximum28.6 deg C≤ 23 deg C24%
July 2026001DpH, maximum8.53 SU≤ 8.5 SU—

Limits in force (138)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximum≤ 23 deg Call year001
Temperature, water deg. centigradedaily maximum≤ 23 deg Call year001
Turbiditydaily average≤ 2 NTUall year001
Turbiditydaily average≤ 2 NTUall year001
Turbiditydaily maximum≤ 5 NTUall year001
Turbiditydaily maximum≤ 5 NTUall year001
Turbiditymonthly average≤ 2 NTUall year001
Turbiditymonthly average≤ 2 NTUall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 lb/dall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 20 lb/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 60 lb/dall year001
BOD, 5-day, 20 deg. Chighest weekly average≤ 60 lb/dall year001
pHminimum≥ 6.5 SUall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 SUall year001
pHmaximum≤ 8.5 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 45 mg/Lall year001
Solids, total suspendedhighest weekly average≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 20 lb/dall year001
Solids, total suspendedmonthly average≤ 20 lb/dall year001
Solids, total suspendedhighest weekly average≤ 60 lb/dall year001
Solids, total suspendedhighest weekly average≤ 60 lb/dall year001
Solids, settleablemonthly average≤ .1 mL/Lall year001
Solids, settleablemonthly average≤ .1 mL/Lall year001
Solids, settleabledaily maximum≤ .2 mL/Lall year001
Solids, settleabledaily maximum≤ .2 mL/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.72 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.72 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 3.45 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 3.45 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.14 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.14 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 4.6 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 1 Ratioall year001
Nitrogen, ammonia total [as N]monthly average≤ 1 Ratioall year001
Nitrogen, ammonia total [as N]daily maximum≤ 1 Ratioall year001
Nitrogen, ammonia total [as N]daily maximum≤ 1 Ratioall year001
Nitrite + Nitrate total [as N]monthly average≤ 10 mg/Lall year001
Nitrite + Nitrate total [as N]monthly average≤ 10 mg/Lall year001
Nitrite + Nitrate total [as N]highest weekly average≤ 17 mg/Lall year001
Nitrite + Nitrate total [as N]highest weekly average≤ 17 mg/Lall year001
Nitrite + Nitrate total [as N]monthly average≤ 6.6 lb/dall year001
Nitrite + Nitrate total [as N]monthly average≤ 6.6 lb/dall year001
Nitrite + Nitrate total [as N]highest weekly average≤ 11.2 lb/dall year001
Nitrite + Nitrate total [as N]highest weekly average≤ 11.2 lb/dall year001
Cyanide, total [as CN]monthly averagereport only (ug/L)all year001
Cyanide, total [as CN]monthly averagereport only (ug/L)all year001
Cyanide, total [as CN]daily maximum≤ 5.2 ug/Lall year001
Cyanide, total [as CN]daily maximum≤ 5.2 ug/Lall year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001
Nickel, total recoverabledaily maximum≤ 52 ug/Lall year001
Nickel, total recoverabledaily maximum≤ 52 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 234 ug/Lall year001
Zinc, total recoverabledaily maximum≤ 234 ug/Lall year001
Cadmium, total recoverabledaily maximum≤ 1.8 ug/Lall year001
Cadmium, total recoverabledaily maximum≤ 1.8 ug/Lall year001
Lead, total recoverabledaily maximum≤ 3.2 ug/Lall year001
Lead, total recoverabledaily maximum≤ 3.2 ug/Lall year001
Copper, total recoverabledaily maximum≤ 18.8 ug/Lall year001
Copper, total recoverabledaily maximum≤ 18.8 ug/Lall year001
Oil and greasemonthly average≤ 10 mg/Lall year001
Oil and greasemonthly average≤ 10 mg/Lall year001
Oil and greasedaily maximum≤ 15 mg/Lall year001
Oil and greasedaily maximum≤ 15 mg/Lall year001
Oil and greasemonthly average≤ 6.6 lb/dall year001
Oil and greasemonthly average≤ 6.6 lb/dall year001
Oil and greasedaily maximum≤ 20 lb/dall year001
Oil and greasedaily maximum≤ 20 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all 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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualmonthly average≤ .08 mg/Lall year001
Chlorine, total residualmonthly average≤ .08 mg/Lall year001
Chlorine, total residualdaily maximum≤ .16 mg/Lall year001
Chlorine, total residualdaily maximum≤ .16 mg/Lall year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolvedmonthly averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Coliform, total general7-day median≤ 2.2 MPN/100mLall year001
Coliform, total general7-day median≤ 2.2 MPN/100mLall year001
Coliform, total generaldaily maximum≤ 23 MPN/100mLall year001
Coliform, total generaldaily maximum≤ 23 MPN/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001D
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001D
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001D
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001D
Turbiditymonthly averagereport only (NTU)all year001D
Turbiditymonthly averagereport only (NTU)all year001D
Turbiditydaily maximumreport only (NTU)all year001D
Turbiditydaily maximumreport only (NTU)all year001D
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year001D
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year001D
pHminimum≥ 6.5 SUall year001D
pHminimum≥ 6.5 SUall year001D
pHmaximum≤ 8.5 SUall year001D
pHmaximum≤ 8.5 SUall year001D
Solids, total dissolvedmonthly averagereport only (mg/L)all year001D
Solids, total dissolvedmonthly averagereport only (mg/L)all year001D
Solids, total dissolveddaily maximumreport only (mg/L)all year001D
Solids, total dissolveddaily maximumreport only (mg/L)all year001D
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001U
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001U
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001U
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001U
Turbiditymonthly averagereport only (NTU)all year001U
Turbiditymonthly averagereport only (NTU)all year001U
Turbiditydaily maximumreport only (NTU)all year001U
Turbiditydaily maximumreport only (NTU)all year001U
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year001U
Oxygen, dissolved [DO]daily minimum≥ 7 mg/Lall year001U
pHminimum≥ 6.5 SUall year001U
pHminimum≥ 6.5 SUall year001U
pHmaximum≤ 8.5 SUall year001U
pHmaximum≤ 8.5 SUall year001U
Solids, total dissolvedmonthly averagereport only (mg/L)all year001U
Solids, total dissolvedmonthly averagereport only (mg/L)all year001U
Solids, total dissolveddaily maximumreport only (mg/L)all year001U
Solids, total dissolveddaily maximumreport only (mg/L)all year001U
BOD, 5-day, 20 deg. Chighest weekly averagereport only (mg/L)all yearINF
BOD, 5-day, 20 deg. Chighest weekly averagereport only (mg/L)all yearINF
Solids, total suspendedhighest weekly averagereport only (mg/L)all yearINF
Solids, total suspendedhighest weekly averagereport only (mg/L)all yearINF

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/CA0049675 · MCP: https://passage-data.com/mcp