SILVER CLIFF RANCH
NPDES ID: COG591221
D — SNC: Discharge monitoring report not received
The facility didn't submit its required discharge monitoring report.
Violations
December 31, 2025
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (30DA AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (30DA AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MX 7D AV)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MX 7D AV)
DMR, Monitor Only - Overdue
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (MX 7D AV)
DMR, Monitor Only - Overdue
June 30, 2025
Nitrogen, inorganic total
19% over limit
Discharged 35.7 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Uranium, potentially dissolvd
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Mercury, total [low level]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Iron, total recoverable
0% over limit
Discharged 0.105 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Nickel, potentially dissolvd
0% over limit
Discharged 0.0032 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Chromium, trivalent, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Arsenic, potentially dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Sulfide-hydrogen sulfide [undissociated]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.031 mg/L (30DA AVG)
DMR, Limited - Overdue
Silver, potentially dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Manganese, dissolved [as Mn]
0% over limit
Discharged 0.0165 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Manganese, potentially dissolvd
0% over limit
Discharged 0.0192 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Uranium, potentially dissolvd
0% over limit
Discharged 0.001 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.058 mg/L against a permitted limit of 0.084 mg/L (30DA AVG)
DMR, Limited - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Selenium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Manganese, potentially dissolvd
0% over limit
Discharged 0.0192 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Chromium, trivalent total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, potentially dissolved
0% over limit
Discharged 0.0176 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.058 mg/L against a permitted limit of 0.11100001 mg/L (DAILY MX)
DMR, Limited - Overdue
Lead, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0016 mg/L (30DA AVG)
DMR, Limited - Overdue
Nickel, potentially dissolvd
0% over limit
Discharged 0.0032 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Chromium, hexavalent dissolved [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Cadmium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0012 mg/L (DAILY MX)
DMR, Limited - Overdue
Cadmium, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Silver, potentially dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Cadmium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00053 mg/L (30DA AVG)
DMR, Limited - Overdue
Arsenic, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Chromium, hexavalent dissolved [as Cr]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Molybdenum, total recoverable
0% over limit
Discharged 0.0108 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Copper, potentially dissolved
0% over limit
Discharged 0.0176 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nickel, total recoverable
0% over limit
Discharged 0.0032 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Lead, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.042 mg/L (DAILY MX)
DMR, Limited - Overdue
Lead, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Iron, dissolved [as Fe]
0% over limit
Discharged 0.088 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
February 28, 2025
Zinc, potentially dissolved
0% over limit
Discharged 0.063 mg/L against a permitted limit of 0.084 mg/L (30DA AVG)
DMR, Limited - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0.063 mg/L against a permitted limit of 0.11100001 mg/L (DAILY MX)
DMR, Limited - Overdue
Arsenic, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Sulfide-hydrogen sulfide [undissociated]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.031 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, nitrite total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Lead, potentially dissolvd
0% over limit
Discharged 0 kg/d against a permitted limit of 181.6 kg/d (30DA AVG)
DMR, Limited - Overdue
Lead, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0016 mg/L (30DA AVG)
DMR, Limited - Overdue
Cadmium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00053 mg/L (30DA AVG)
DMR, Limited - Overdue
Sulfate
0% over limit
Discharged 41.3 mg/L against a permitted limit of 3632 mg/L (30DA AVG)
DMR, Limited - Overdue
Lead, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.042 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, potentially dissolved
0% over limit
Discharged 0 kg/d against a permitted limit of 0.029056 kg/d (30DA AVG)
DMR, Limited - Overdue
Cadmium, potentially dissolvd
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0012 mg/L (DAILY MX)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)