ONE HORSE ESTATES
NPDES ID: MTX000208
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
March 31, 2026
Nitrogen, total [as N]
60% over limit
Discharged 41.63 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, total [as N]
82% over limit
Discharged 47.4 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, total [as N]
74% over limit
Discharged 45.13 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, total [as N]
71% over limit
Discharged 44.5 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, total [as N]
102% over limit
Discharged 52.5 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, total [as N]
28% over limit
Discharged 33.4 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Phosphorus, total [as P]
0% over limit
Discharged 0.007264 kg/d against a permitted limit of 0 kg/d (90DA AVG)
DMR, Monitor Only - Overdue
Chloride [as Cl]
0% over limit
Discharged 14.7 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0.55 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 1.09 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Oil and grease, hexane extr method
0% over limit
Discharged 1 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 4 SU against a permitted limit of 0 SU (AVERAGE)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 0.65829999 kg/d against a permitted limit of 0 kg/d (90DA AVG)
DMR, Monitor Only - Overdue
Specific conductance
0% over limit
Discharged 195 umho/cm against a permitted limit of 0 umho/cm (SINGSAMP)
DMR, Monitor Only - Overdue
E. coli, MTEC-MF
0% over limit
Discharged 41 MPN/100mL against a permitted limit of 0 MPN/100mL (SINGSAMP)
DMR, Monitor Only - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 2.16 mg/L against a permitted limit of 26 mg/L (DAILY MX)
DMR, Limited - Overdue
Water level at sample collection time
0% over limit
Discharged 327.99999714 m against a permitted limit of 0 m (VALUE)
DMR, Monitor Only - Overdue
E. coli, MTEC-MF
0% over limit
Discharged 2420 MPN/100mL against a permitted limit of 0 MPN/100mL (AVERAGE)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.04 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 1.6 mg/L against a permitted limit of 0 mg/L (VALUE)
DMR, Monitor Only - Overdue
Specific conductance
0% over limit
Discharged 1370 umho/cm against a permitted limit of 0 umho/cm (AVERAGE)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 43.5 mg/L against a permitted limit of 0 mg/L (AVERAGE)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 2 mg/L against a permitted limit of 0 mg/L (VALUE)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 5.29 mg/L against a permitted limit of 0 mg/L (AVERAGE)
DMR, Monitor Only - Overdue
Nitrogen, Kjeldahl, total [as N]
0% over limit
Discharged 8.32 mg/L against a permitted limit of 0 mg/L (VALUE)
DMR, Monitor Only - Overdue
Flow rate
0% over limit
Discharged 0.004702 MGD against a permitted limit of 0.021 MGD (DAILY MX)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 5.73 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Flow rate
0% over limit
Discharged 0.00317 MGD against a permitted limit of 0 MGD (DAILY AV)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)