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BLX Mayflower, LLC

Gold Ores, Park City, Utah. NPDES permit UT0026140, in force until Jan 31, 2031. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (8 values), outfall 001 form P quarterly (11 values), outfall 001 form W quarterly (1 value), outfall 002 form A quarterly (7 values), outfall 002 form P quarterly (11 values), outfall 002 form W every 60 months
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 28 reports late

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

Period endingParameterReportedLimitOver by
December 2025Iron, total [as Fe], daily maximum1.28 mg/L≤ 1.194 mg/L7%

Limits in force (40)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily minimum≥ 5 mg/Lall year001
pHdaily minimum≥ 6.5 SUall year001
pHdaily maximum≤ 9 SUall year001
Solids, total suspendedmaximum monthly average≤ 25 mg/Lall year001
Solids, total suspendedmaximum weekly average≤ 35 mg/Lall year001
Arsenic, total [as As]maximum monthly averagereport only (mg/L)all year001
Barium, total [as Ba]maximum monthly averagereport only (mg/L)all year001
Cadmium, total [as Cd]maximum monthly averagereport only (mg/L)all year001
Chromium, total [as Cr]maximum monthly averagereport only (mg/L)all year001
Copper, total [as Cu]maximum monthly averagereport only (mg/L)all year001
Iron, total [as Fe]maximum monthly averagereport only (mg/L)all year001
Iron, total [as Fe]daily maximumreport only (mg/L)all year001
Lead, total [as Pb]maximum monthly averagereport only (mg/L)all year001
Silver, total [as Ag]maximum monthly averagereport only (mg/L)all year001
Zinc, total [as Zn]maximum monthly averagereport only (mg/L)all year001
Zinc, total [as Zn]daily maximumreport only (mg/L)all year001
Selenium, total [as Se]maximum monthly averagereport only (mg/L)all year001
Mercury, total [as Hg]maximum monthly averagereport only (mg/L)all year001
Flow, totalmaximum monthly average≤ 1 MGDall year001
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximumreport only (pass=0;fail=1)Apr, May, Jun, Oct, Nov, Dec001
Pass/Fail Static Renewal 7Day Chronic Pimephales promelasdaily maximumreport only (pass=0;fail=1)Jan, Feb, Mar, Jul, Aug, Sep001
Oxygen, dissolved [DO]daily minimumreport only (mg/L)all year002
pHdaily minimumreport only (SU)all year002
pHdaily maximumreport only (SU)all year002
Solids, total suspendedmaximum monthly averagereport only (mg/L)all year002
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year002
Arsenic, total [as As]maximum monthly averagereport only (mg/L)all year002
Barium, total [as Ba]maximum monthly averagereport only (mg/L)all year002
Cadmium, total [as Cd]maximum monthly averagereport only (mg/L)all year002
Chromium, total [as Cr]maximum monthly averagereport only (mg/L)all year002
Copper, total [as Cu]maximum monthly averagereport only (mg/L)all year002
Iron, total [as Fe]maximum monthly averagereport only (mg/L)all year002
Lead, total [as Pb]maximum monthly averagereport only (mg/L)all year002
Silver, total [as Ag]maximum monthly averagereport only (mg/L)all year002
Zinc, total [as Zn]maximum monthly averagereport only (mg/L)all year002
Selenium, total [as Se]maximum monthly averagereport only (mg/L)all year002
Mercury, total [as Hg]maximum monthly averagereport only (mg/L)all year002
Flow, totalmaximum monthly averagereport only (MGD)all year002
Flow, totaldaily maximumreport only (MGD)all year002
Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiadaily maximumreport only (pass=0;fail=1)all year002

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/UT0026140 · MCP: https://passage-data.com/mcp