CHATTEM CHEMICALS, INC. (SUN-PHARMA)
NPDES ID: TN0002780
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: 4 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
260% over limit
Discharged 4.32 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
106% over limit
Discharged 4.95 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
156% over limit
Discharged 6.14 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
280% over limit
Discharged 4.56 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
119% over limit
Discharged 5.25 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
266% over limit
Discharged 4.39 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
226% over limit
Discharged 3.91 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
87% over limit
Discharged 4.49 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
282% over limit
Discharged 4.58 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
135% over limit
Discharged 5.65 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
184% over limit
Discharged 3.41 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
114% over limit
Discharged 5.13 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Zinc, total [as Zn]
0% over limit
Discharged 0.02 mg/L against a permitted limit of 0.3 mg/L (DAILY MX)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0.02 mg/L against a permitted limit of 0.05 mg/L (MO AVG)
DMR, Limited - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0.2 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Mercury, total [as Hg]
0% over limit
Discharged 0.000005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
280% over limit
Discharged 4.56 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
156% over limit
Discharged 6.14 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Zinc, total [as Zn]
0% over limit
Discharged 0.02 mg/L against a permitted limit of 0.3 mg/L (DAILY MX)
DMR, Limited - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0.2 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
4% over limit
Discharged 4.8 mg/L against a permitted limit of 5 mg/L (MINIMUM)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
299% over limit
Discharged 4.79 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
154% over limit
Discharged 6.1 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
0% over limit
Discharged 0.02 mg/L against a permitted limit of 0.05 mg/L (MO AVG)
DMR, Limited - Overdue
September 30, 2025
Nitrogen, ammonia total [as N]
190% over limit
Discharged 6.95 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
279% over limit
Discharged 4.55 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
348% over limit
Discharged 5.38 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
253% over limit
Discharged 8.46 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
346% over limit
Discharged 10.7 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
519% over limit
Discharged 7.43 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
5% over limit
Discharged 21 mg/L against a permitted limit of 20 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Oil and grease
0% over limit
Discharged 5 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
499% over limit
Discharged 7.19 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
329% over limit
Discharged 10.3 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
234% over limit
Discharged 8.01 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
393% over limit
Discharged 5.91 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
323% over limit
Discharged 5.08 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total [as Hg]
0% over limit
Discharged 0.000005 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
226% over limit
Discharged 7.82 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
184% over limit
Discharged 3.41 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
114% over limit
Discharged 5.13 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
204% over limit
Discharged 3.65 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
118% over limit
Discharged 5.22 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
245% over limit
Discharged 8.28 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
328% over limit
Discharged 5.14 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
248% over limit
Discharged 4.17 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
120% over limit
Discharged 5.27 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
214% over limit
Discharged 7.53 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
202% over limit
Discharged 3.62 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
261% over limit
Discharged 8.66 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.05 mg/L (MO AVG)
DMR, Limited - Overdue
Zinc, total [as Zn]
0% over limit
Discharged 0.01 mg/L against a permitted limit of 0.3 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
478% over limit
Discharged 6.94 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
345% over limit
Discharged 5.34 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
287% over limit
Discharged 9.29 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
530% over limit
Discharged 7.56 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
692% over limit
Discharged 19 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
220% over limit
Discharged 7.69 mg/L against a permitted limit of 2.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
291% over limit
Discharged 4.69 mg/L against a permitted limit of 1.2 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)