Granite Rock Company

NPDES permit CA0005274 · Minor NON-POTW · expired, expires 2022-11-30 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2022-11-30 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

6values over a limit
0required values missing, on 0 form(s)
1of 11 forms filed late

Last period with anything received: 2026-07-31. Most often over: Solids, total dissolved (2), Molybdenum, total [as Mo] (2), Di[2-ethylhexyl] phthalate [DEHP] (1).

Reporting

Reports are due about 29 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (39)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitINST MIN report only all year
001TurbidityDAILY MX <= 50 NTU all year
001pHMINIMUM >= 7 SU all year
001pHMAXIMUM <= 8.3 SU all year
001Solids, total suspendedMO AVG <= 50 mg/L all year
001Cyanide, total [as CN]MO AVG <= 4.3 ug/L all year
001Cyanide, total [as CN]DAILY MX <= 8.5 ug/L all year
001Sodium, total recoverableDAILY MX report only all year
001Chloride [as Cl]DAILY MX report only all year
001Sulfate, total [as SO4]DAILY MX report only all year
001Iron, total recoverableMO AVG <= 1000 ug/L all year
001Boron, total recoverableDAILY MX report only all year
001Molybdenum, total [as Mo]MO AVG <= 10 ug/L all year
001Nickel, total recoverableDAILY MX report only all year
001Aluminum, total recoverableMO AVG <= 1000 ug/L all year
001Aluminum, total recoverableDAILY MX <= 5000 ug/L all year
001Copper, total recoverableMO AVG <= 12 ug/L all year
001Copper, total recoverableDAILY MX <= 24 ug/L all year
001Oil and greaseDAILY MX report only all year
001ChlorpyrifosDAILY MX report only all year
001Di[2-ethylhexyl] phthalate [DEHP]MO AVG <= 1.8 ug/L all year
001Di[2-ethylhexyl] phthalate [DEHP]DAILY MX <= 3.6 ug/L all year
001DiazinonDAILY MX report only all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Solids, total dissolvedMO AVG <= 1000 mg/L all year
001Mercury, total recoverableMO AVG <= .05 ug/L all year
001Mercury, total recoverableDAILY MX <= .1 ug/L all year
001Coliform, fecal generalDAILY MX report only all year
001Sediment, suspendedMO AVG report only all year
001Sediment, suspendedDAILY MX report only all year
001%Effect Static 4 Day Chronic Raphidocelis subcapitataMO MED report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO MED report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMO MED report only all year
001Pass/Fail Static 4 Day Chronic Raphidocelis subcapitataMO MED <= 0 pass=0;fail=1 all year
001Pass/Fail Static 4 Day Chronic Raphidocelis subcapitataDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaMO MED <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasMO MED <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 7Day Chronic Pimephales promelasDAILY MX <= 0 pass=0;fail=1 all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states