WALLIS SANDS STATE PARK
NPDES ID: NHG580014
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: 8 effluent violations.
Violations
June 30, 2026
Copper, total [as Cu]
122% over limit
Discharged 0.0082 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
165% over limit
Discharged 0.022 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
139% over limit
Discharged 64.1 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
55% over limit
Discharged 0.009 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2026
Copper, total [as Cu]
146% over limit
Discharged 0.0091 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
416% over limit
Discharged 22.6 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
51% over limit
Discharged 0.0125 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
67% over limit
Discharged 0.0097 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Nickel, total [as Ni]
129% over limit
Discharged 0.019 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
154% over limit
Discharged 0.0094 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
62% over limit
Discharged 0.0094 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Copper, total [as Cu]
162% over limit
Discharged 0.0097 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
82% over limit
Discharged 2.2 mg/L against a permitted limit of 1.21 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
171% over limit
Discharged 0.0225 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
72% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nickel, total [as Ni]
45% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Overdue
Nickel, total [as Ni]
45% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
245% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total [as Cu]
245% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
359% over limit
Discharged 0.017 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
359% over limit
Discharged 0.017 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
441% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
441% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
245% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total [as Cu]
245% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
20% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Overdue
Nickel, total [as Ni]
20% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total [as Cu]
159% over limit
Discharged 0.015 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total [as Cu]
159% over limit
Discharged 0.015 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
567% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
567% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Nickel, total [as Ni]
8% over limit
Discharged 0.009 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Overdue
Nickel, total [as Ni]
8% over limit
Discharged 0.009 mg/L against a permitted limit of 0.0083 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
278% over limit
Discharged 0.014 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
278% over limit
Discharged 0.014 mg/L against a permitted limit of 0.0037 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Solids, suspended percent removal
150% over limit
Discharged 62.5 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
August 31, 2024
Solids, suspended percent removal
169% over limit
Discharged 59.6 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (11 hours ago)