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Martin Marietta Materials, Inc.

Crushed And Broken Granite, Granite Canyon, Wyoming. NPDES permit WY0034266, in force until Oct 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form MQ quarterly
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (26)

ParameterStatisticLimitMonths
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 2.21 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.21 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 1.71 mg/LMay–Sep
Nitrogen, ammonia total [as N]monthly average≤ 1.71 mg/LMay–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 5.62 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 5.62 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 5.62 mg/LMay–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 5.62 mg/LMay–Sep
Durationmonthly totalreport only (d)all year
Durationmonthly totalreport only (d)all year
Flowmonthly averagereport only (MGD)all year
Flowmonthly averagereport only (MGD)all year
Flowdaily maximumreport only (MGD)all year
Flowdaily maximumreport only (MGD)all year
Produced water, oil and greasedaily maximum≤ 10 mg/Lall year
Produced water, oil and greasedaily maximum≤ 10 mg/Lall year

How strict are these limits?

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

Same industry: the 8 Mining and Quarrying of Nonmetallic Minerals permits in Wyoming.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WY0034266 · MCP: https://passage-data.com/mcp