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Heritage Ranch CSD

Sewage treatment plant, Paso Robles, California. NPDES permit CA0048941 expired Nov 30, 2022; its limits still apply. Last 12 months: over a limit 3 times (last July 2026), 4 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 32 days after each period: outfall 001A form A monthly (23 values), outfall INF form A monthly (4 values), outfall 001A form S twice a year, outfall 001A form Y yearly, outfall INF form S twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
6 values over a limit, 0 required values missing, 0 of 29 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, weekly average51 mg/L≤ 45 mg/L13%
April 2026BOD, 5-day, 20 deg. C, weekly average68 mg/L≤ 45 mg/L51%
July 2026Coliform, total general, instantaneous maximum> 1600 MPN/100mL≤ 2400 MPN/100mL—

Limits in force (80)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. fahrenheitinstantaneous maximumreport only (deg F)all year001A
Turbiditydaily maximumreport only (NTU)all year001A
Color [PT-CO units]daily maximumreport only (col unit (pc))all year001A
Oxygen, dissolved [DO]instantaneous minimumreport only (mg/L)all year001A
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001A
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001A
BOD, 5-day, 20 deg. Cdaily maximum≤ 90 mg/Lall year001A
pHminimum≥ 6 SUall year001A
pHmaximum≤ 8.3 SUall year001A
Solids, total suspendedmonthly average≤ 30 mg/Lall year001A
Solids, total suspendedweekly average≤ 45 mg/Lall year001A
Solids, total suspendeddaily maximum≤ 90 mg/Lall year001A
Solids, settleabledaily maximum≤ .1 mL/Lall year001A
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001A
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001A
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year001A
Nitrogen, ammonia, tot unionized [as N]monthly average≤ .025 mg/Lall year001A
Nitrogen, ammonia, tot unionized [as N]monthly average≤ .025 mg/Lall year001A
Nitrogen, ammonia, tot unionized [as N]monthly average≤ 2 mg/Lall year001A
Nitrogen, ammonia, tot unionized [as N]monthly average≤ 2 mg/Lall year001A
Nitrogen, ammonia, tot unionized [as N]monthly average≤ 2 mg/Lall year001A
Nitrogen, ammonia, tot unionized [as N]monthly average≤ 2 mg/Lall year001A
Nitrogen, nitrate total [as N]daily maximum≤ 10 mg/Lall year001A
Nitrogen, nitrate total [as N]daily maximum≤ 10 mg/Lall year001A
Nitrogen, nitrate total [as N]daily maximum≤ 17 mg/Lall year001A
Nitrogen, nitrate total [as N]daily maximum≤ 17 mg/Lall year001A
Nitrogen, nitrate total [as N]daily maximum≤ 17 mg/Lall year001A
Nitrogen, nitrate total [as N]daily maximum≤ 17 mg/Lall year001A
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year001A
Sodium, total recoverabledaily maximumreport only (mg/L)all year001A
Sodium, total recoverabledaily maximumreport only (mg/L)all year001A
Chloride [as Cl]daily maximumreport only (mg/L)all year001A
Chloride [as Cl]daily maximumreport only (mg/L)all year001A
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001A
Sulfate, total [as SO4]daily maximumreport only (mg/L)all year001A
Boron, total recoverabledaily maximumreport only (mg/L)all year001A
Boron, total recoverabledaily maximumreport only (mg/L)all year001A
Aluminum, total recoverabledaily maximumreport only (ug/L)all year001A
Copper, total recoverablemonthly average≤ 11 ug/Lall year001A
Copper, total recoverablemonthly average≤ 11 ug/Lall year001A
Copper, total recoverablemonthly average≤ 18 ug/Lall year001A
Copper, total recoverablemonthly average≤ 18 ug/Lall year001A
Copper, total recoverablemonthly average≤ 18 ug/Lall year001A
Copper, total recoverablemonthly average≤ 18 ug/Lall year001A
Copper, total recoverabledaily maximum≤ 22 ug/Lall year001A
Copper, total recoverabledaily maximum≤ 22 ug/Lall year001A
Copper, total recoverabledaily maximum≤ 25 ug/Lall year001A
Copper, total recoverabledaily maximum≤ 25 ug/Lall year001A
Copper, total recoverabledaily maximum≤ 25 ug/Lall year001A
Copper, total recoverabledaily maximum≤ 25 ug/Lall year001A
Oil and greasemonthly average≤ 10 mg/Lall year001A
Oil and greasedaily maximum≤ 20 mg/Lall year001A
Chlorine, total residualdaily maximum≤ 0 ug/Lall year001A
Solids, total dissolveddaily maximumreport only (mg/L)all year001A
Solids, total dissolveddaily maximumreport only (mg/L)all year001A
Coliform, fecal generallog mean≤ 200 MPN/100mLall year001A
Coliform, fecal general90th percentile≤ 400 MPN/100mLall year001A
Coliform, total general7-day median≤ 23 MPN/100mLall year001A
Coliform, total generalinstantaneous maximum≤ 2400 MPN/100mLall year001A
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001A
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001A
% Survival Static Renewal 96Hr Acute Pimephales promelasminimumreport only (% survival)all year001A
% Survival Static Renewal 96Hr Acute Pimephales promelasminimum medianreport only (% survival)all year001A
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearINF
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF
Nitrogen, total [as N]daily maximumreport only (mg/L)all yearINF
Nitrogen, total [as N]daily maximumreport only (mg/L)all yearINF
Sodium, total recoverabledaily maximumreport only (mg/L)all yearINF
Sodium, total recoverabledaily maximumreport only (mg/L)all yearINF
Chloride [as Cl]daily maximumreport only (mg/L)all yearINF
Chloride [as Cl]daily maximumreport only (mg/L)all yearINF
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearINF
Sulfate, total [as SO4]daily maximumreport only (mg/L)all yearINF
Boron, total recoverabledaily maximumreport only (mg/L)all yearINF
Boron, total recoverabledaily maximumreport only (mg/L)all yearINF
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF
Solids, total dissolveddaily maximumreport only (mg/L)all yearINF
Solids, total dissolveddaily maximumreport only (mg/L)all yearINF

How strict are these limits?

Cited limits by parameter: California'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/CA0048941 · MCP: https://passage-data.com/mcp