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Lake Catherine WW & Sewer Facilities Board of Garland Co. Riviera Utilities WWTF

Sewage treatment plant, Garland County, Arkansas. NPDES permit AR0048615, in force until Jan 31, 2027. Last 12 months: over a limit 7 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (20 values), form Y yearly
Renewal application due
Aug 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
7 values over a limit, 0 required values missing, 0 of 13 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
November 2025Nitrogen, ammonia total [as N], monthly average14.3 mg/L≤ 10 mg/L43%
November 2025Nitrogen, ammonia total [as N], monthly average5.5 lb/d≤ 4.2 lb/d31%
January 2026Nitrogen, ammonia total [as N], 7-day average22.8 mg/L≤ 14.7 mg/L55%
January 2026Nitrogen, ammonia total [as N], monthly average22.8 mg/L≤ 10 mg/L128%
January 2026Nitrogen, ammonia total [as N], monthly average7.04 lb/d≤ 4.2 lb/d68%
March 2026Nitrogen, ammonia total [as N], 7-day average18 mg/L≤ 14.7 mg/L22%
March 2026Nitrogen, ammonia total [as N], monthly average18 mg/L≤ 10 mg/L80%

Limits in force (34)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspended7-day average≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 6.3 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]7-day average≤ 5.2 mg/LApr
Nitrogen, ammonia total [as N]7-day average≤ 5.2 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 14.7 mg/LJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.2 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 4.2 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.1 lb/dMay–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]7-day averagereport only (mg/L)all year
Nitrite + Nitrate total [as N]monthly averagereport only (lb/d)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]7-day averagereport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (lb/d)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year
Peracetic Acidinstantaneous maximum≤ 1 mg/Lall year
Coliform, fecal general30-day geometric mean≤ 200 #/100mLApr–Sep
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLJan, Feb, Mar, Oct, Nov, Dec
Coliform, fecal general7-day geometric mean≤ 400 #/100mLApr–Sep
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLJan, Feb, Mar, Oct, Nov, Dec
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year
BOD, carbonaceous [5 day, 20 C]7-day average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4.2 lb/dall year

How strict are these limits?

Cited limits by parameter: Arkansas's rules and the federal ones.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0048615 · MCP: https://passage-data.com/mcp