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Mountain Top Suburban Improvement District #66 of Garland County, AR

Sewage treatment plant, Hot Springs Village, Arkansas. NPDES permit AR0045047, in force until Aug 31, 2030. Last 12 months: over a limit 68 times (last August 2026), 136 required values missing, 13 of 29 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 26 days after each period: form A monthly (6 values), form A2 monthly (22 values), form Q quarterly (15 values), form F quarterly, form Y yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
45 values over a limit, 43 required values missing, 4 of 20 reports late

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

All 68 values over a limit
Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, instantaneous maximum.39 mg/L≤ .011 mg/L3445%
October 2025Chlorine, total residual, instantaneous maximum.39 mg/L≤ .011 mg/L3445%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average61.2 mg/L≤ 15 mg/L308%
December 2025BOD, carbonaceous [5 day, 20 C], 7-day average61.2 mg/L≤ 15 mg/L308%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average18.12 lb/d≤ 5 lb/d262%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average18.12 lb/d≤ 5 lb/d262%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average61.2 mg/L≤ 10 mg/L512%
December 2025BOD, carbonaceous [5 day, 20 C], monthly average61.2 mg/L≤ 10 mg/L512%
December 2025Coliform, fecal general, 30-day average> 2420 #/100L≤ 1000 #/100L—
December 2025Coliform, fecal general, 30-day average> 2420 #/100L≤ 1000 #/100L—
December 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100L≤ 2000 #/100L—
December 2025Coliform, fecal general, 7-day geometric mean> 2420 #/100L≤ 2000 #/100L—
December 2025Nitrogen, ammonia total [as N], 7-day average19.5 mg/L≤ 14.7 mg/L33%
December 2025Nitrogen, ammonia total [as N], 7-day average19.5 mg/L≤ 14.7 mg/L33%
December 2025Nitrogen, ammonia total [as N], monthly average19.5 mg/L≤ 10 mg/L95%
December 2025Nitrogen, ammonia total [as N], monthly average19.5 mg/L≤ 10 mg/L95%
December 2025Nitrogen, ammonia total [as N], monthly average5.8 lb/d≤ 5 lb/d16%
December 2025Nitrogen, ammonia total [as N], monthly average5.8 lb/d≤ 5 lb/d16%
December 2025Solids, total suspended, 7-day average38.8 mg/L≤ 22.5 mg/L72%
December 2025Solids, total suspended, 7-day average38.8 mg/L≤ 22.5 mg/L72%
December 2025Solids, total suspended, monthly average11.5 lb/d≤ 7.5 lb/d53%
December 2025Solids, total suspended, monthly average11.5 lb/d≤ 7.5 lb/d53%
December 2025Solids, total suspended, monthly average38.8 mg/L≤ 15 mg/L159%
December 2025Solids, total suspended, monthly average38.8 mg/L≤ 15 mg/L159%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average37.6 mg/L≤ 15 mg/L151%
January 2026BOD, carbonaceous [5 day, 20 C], 7-day average37.6 mg/L≤ 15 mg/L151%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average18.7 lb/d≤ 5 lb/d274%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average18.7 lb/d≤ 5 lb/d274%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average37.6 mg/L≤ 10 mg/L276%
January 2026BOD, carbonaceous [5 day, 20 C], monthly average37.6 mg/L≤ 10 mg/L276%
January 2026Chlorine, total residual, instantaneous maximum.04 mg/L≤ .011 mg/L264%
January 2026Chlorine, total residual, instantaneous maximum.04 mg/L≤ .011 mg/L264%
January 2026Nitrogen, ammonia total [as N], 7-day average27.4 mg/L≤ 14.7 mg/L86%
January 2026Nitrogen, ammonia total [as N], 7-day average27.4 mg/L≤ 14.7 mg/L86%
January 2026Nitrogen, ammonia total [as N], monthly average13.62 lb/d≤ 5 lb/d172%
January 2026Nitrogen, ammonia total [as N], monthly average13.62 lb/d≤ 5 lb/d172%
January 2026Nitrogen, ammonia total [as N], monthly average27.4 mg/L≤ 10 mg/L174%
January 2026Nitrogen, ammonia total [as N], monthly average27.4 mg/L≤ 10 mg/L174%
February 2026BOD, carbonaceous [5 day, 20 C], 7-day average87.4 mg/L≤ 15 mg/L483%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average17.06 lb/d≤ 5 lb/d241%
February 2026BOD, carbonaceous [5 day, 20 C], monthly average87.4 mg/L≤ 10 mg/L774%
February 2026Chlorine, total residual, instantaneous maximum.03 mg/L≤ .011 mg/L173%
February 2026Nitrogen, ammonia total [as N], 7-day average24.7 mg/L≤ 14.7 mg/L68%
February 2026Nitrogen, ammonia total [as N], monthly average24.7 mg/L≤ 10 mg/L147%
March 2026BOD, carbonaceous [5 day, 20 C], 7-day average41.7 mg/L≤ 15 mg/L178%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average10.1 lb/d≤ 5 lb/d102%
March 2026BOD, carbonaceous [5 day, 20 C], monthly average41.7 mg/L≤ 10 mg/L317%
March 2026Chlorine, total residual, instantaneous maximum1.17 mg/L≤ .011 mg/L10536%
March 2026Nitrogen, ammonia total [as N], 7-day average25.1 mg/L≤ 14.7 mg/L71%
March 2026Nitrogen, ammonia total [as N], monthly average25.1 mg/L≤ 10 mg/L151%
March 2026Nitrogen, ammonia total [as N], monthly average6.07 lb/d≤ 5 lb/d21%
March 2026Solids, total suspended, 7-day average55.7 mg/L≤ 22.5 mg/L148%
March 2026Solids, total suspended, monthly average13.5 lb/d≤ 7.5 lb/d80%
March 2026Solids, total suspended, monthly average55.7 mg/L≤ 15 mg/L271%
April 2026BOD, carbonaceous [5 day, 20 C], 7-day average25.4 mg/L≤ 15 mg/L69%
April 2026BOD, carbonaceous [5 day, 20 C], monthly average25.4 mg/L≤ 10 mg/L154%
April 2026Nitrogen, ammonia total [as N], 7-day average9.02 mg/L≤ 5.2 mg/L73%
April 2026Nitrogen, ammonia total [as N], monthly average9.02 mg/L≤ 5.2 mg/L73%
April 2026Solids, total suspended, 7-day average25 mg/L≤ 22.5 mg/L11%
April 2026Solids, total suspended, monthly average25 mg/L≤ 15 mg/L67%
May 2026Coliform, fecal general, 30-day average> 2420 #/100L≤ 1000 #/100L—
May 2026Coliform, fecal general, 7-day geometric mean> 2420 #/100L≤ 2000 #/100L—
June 2026Solids, total suspended, monthly average22 mg/L≤ 15 mg/L47%
July 2026BOD, carbonaceous [5 day, 20 C], 7-day average15.7 mg/L≤ 15 mg/L5%
July 2026BOD, carbonaceous [5 day, 20 C], monthly average15.7 mg/L≤ 10 mg/L57%
August 2026BOD, carbonaceous [5 day, 20 C], 7-day average17.3 mg/L≤ 15 mg/L15%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average17.3 mg/L≤ 10 mg/L73%
August 2026Oxygen, dissolved [DO], instantaneous minimum1.62 mg/L≥ 2 mg/L19%

Limits in force (64)

ParameterStatisticLimitMonths
Flow ratemonthly averagereport only (%)all year
Flow ratemonthly averagereport only (%)all year
Flow rate7-day averagereport only (%)all year
Flow rate7-day averagereport only (%)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspendedmonthly average≤ 15 mg/Lall year
Solids, total suspended7-day average≤ 22.5 mg/Lall year
Solids, total suspended7-day average≤ 22.5 mg/Lall year
Solids, total suspendedmonthly average≤ 6 lb/dall year
Solids, total suspendedmonthly average≤ 7.5 lb/dall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Grease7-day average≤ 15 mg/Lall year
Oil & Grease7-day average≤ 15 mg/Lall year
Oil & Greasemonthly average≤ 4 lb/dall year
Oil & Greasemonthly average≤ 5 lb/dall year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]7-day averagereport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (lb/d)all 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]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≤ 7.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]7-day average≤ 14.7 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≤ 7.5 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≤ 2.1 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 2 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 4 lb/dJan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.6 lb/dApr
Nitrogen, ammonia total [as N]monthly average≤ 2.5 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dJan, Feb, Mar, Nov, Dec
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 plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualinstantaneous maximumreport only (mg/L)all year
Chlorine, total residualinstantaneous maximum≤ .011 mg/Lall year
Coliform, fecal general30-day geometric mean≤ 1000 #/100mLall year
Coliform, fecal general30-day average≤ 1000 #/100Lall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100mLall year
Coliform, fecal general7-day geometric mean≤ 2000 #/100Lall year
Overflowsmonthly totalreport only (occur/mo)all year
Overflowsmonthly totalreport only (occur/mo)all year
Overflow volume [SS0 volume, CSO volume]monthly totalreport only (gal)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]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]7-day average≤ 15 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 5 lb/dall year

How strict are these limits?

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

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