VAIL REST AREA
NPDES ID: COX631011
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 3 effluent violations.
Violations
May 31, 2026
Chloride [as Cl]
18% over limit
Discharged 485 mg/L against a permitted limit of 410 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Chloride [as Cl]
8% over limit
Discharged 444 mg/L against a permitted limit of 410 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, inorganic total
781% over limit
Discharged 88.1 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Phosphorus, total [as P]
228% over limit
Discharged 1.64 mg/L against a permitted limit of 0.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Sulfate, total [as SO4]
6% over limit
Discharged 266 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 23.6079998 kg/d (30DA AVG)
DMR, Limited - 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
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
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.012 MGD (30DA AVG)
DMR, Limited - 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 (30DA AVG)
DMR, Monitor Only - Overdue
December 31, 2025
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
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 0.012 MGD (30DA AVG)
DMR, Limited - Overdue
Phosphorus, total [as P]
138% over limit
Discharged 1.19 mg/L against a permitted limit of 0.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.004836 kg/d (ANNL TOT)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 23.6079998 kg/d (30DA AVG)
DMR, Limited - Overdue
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
Nitrogen, inorganic total
960% over limit
Discharged 106 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
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
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
November 30, 2025
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 0.012 MGD (30DA AVG)
DMR, Limited - 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
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
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
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 23.6079998 kg/d (30DA AVG)
DMR, Limited - Overdue
Nitrogen, inorganic total
822% over limit
Discharged 92.2 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
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
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 23.6079998 kg/d (30DA AVG)
DMR, Limited - 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
Nitrogen, inorganic total
613% over limit
Discharged 71.3 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
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
Phosphorus, total [as P]
132% over limit
Discharged 1.16 mg/L against a permitted limit of 0.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.012 MGD (30DA AVG)
DMR, Limited - Overdue
June 30, 2025
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 23.6079998 kg/d (30DA AVG)
DMR, Limited - 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, percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - 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
Nitrogen, inorganic total
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Overdue
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
Oil and grease visual
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (INST MAX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Overdue
Solids, total dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 2250 mg/L (30DA AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - 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, suspended percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.5 mg/L (30DA AVG)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 0 mg/L against a permitted limit of 410 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.012 MGD (30DA AVG)
DMR, Limited - Overdue
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (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 (DAILY MX)
DMR, Monitor Only - Overdue
Coliform, total general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 23 MPN/100mL (MAXIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Overdue
Coliform, total general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 2.2 MPN/100mL (30DA AVG)
DMR, Limited - Overdue
Oil and grease
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 0 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Overdue
May 31, 2025
Solids, total dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 2250 mg/L (30DA AVG)
DMR, Limited - Overdue
Coliform, total general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 23 MPN/100mL (MAXIMUM)
DMR, Limited - Overdue
Solids, suspended percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - 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 23.6079998 kg/d (30DA AVG)
DMR, Limited - Overdue
Plant capacity fact. percent of capacity
0% over limit
Discharged 0 % against a permitted limit of 0 % (30DA AVG)
DMR, Monitor Only - Overdue
Oil and grease
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (INST MAX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - 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
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (30DA AVG)
DMR, Limited - Overdue
Sulfate, total [as SO4]
0% over limit
Discharged 0 mg/L against a permitted limit of 250 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - 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
BOD, 5-day, percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (MX 7D AV)
DMR, Limited - 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
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0.012 MGD (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 0 mg/L against a permitted limit of 410 mg/L (30DA AVG)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.5 mg/L (30DA AVG)
DMR, Limited - Overdue
Coliform, total general
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 2.2 MPN/100mL (30DA AVG)
DMR, Limited - Overdue
Nitrogen, inorganic total
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - 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
Oil and grease visual
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (INST MAX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (22 days ago)