HIGHLAND COMMUNITY SCHOOL
NPDES ID: IA0070084
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: 1 effluent violation.
Violations
April 30, 2026
Chloride [as Cl]
5% over limit
Discharged 5.60381275 kg/d against a permitted limit of 5.31179996 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Chloride [as Cl]
70% over limit
Discharged 660 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
5% over limit
Discharged 660 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride [as Cl]
131% over limit
Discharged 12.2678063 kg/d against a permitted limit of 5.31179996 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
43% over limit
Discharged 12.2678063 kg/d against a permitted limit of 8.58059993 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
39% over limit
Discharged 540 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Chloride [as Cl]
3% over limit
Discharged 400 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
16% over limit
Discharged 0.01575108 kg/d against a permitted limit of 0.01362 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chloride [as Cl]
32% over limit
Discharged 7.00476594 kg/d against a permitted limit of 5.31179996 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Chloride [as Cl]
0% over limit
Discharged 630 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
62% over limit
Discharged 630 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Chloride [as Cl]
34% over limit
Discharged 840 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
116% over limit
Discharged 840 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
80% over limit
Discharged 9.54162712 kg/d against a permitted limit of 5.31179996 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
11% over limit
Discharged 9.54162712 kg/d against a permitted limit of 8.58059993 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)