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Riverside Water and Sewer District

Water Supply, Orofino, Idaho. NPDES permit ID0021237, in force until Dec 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (18 values), form Q quarterly (8 values), form Y yearly
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 17 reports late

Limits in force (54)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Turbiditymonthly averagereport only (NTU)all year
Turbiditydaily maximumreport only (NTU)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 10.8 lb/dall year
Solids, total suspendeddaily maximum≤ 16.1 lb/dall year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Arsenic, total [as As]monthly averagereport only (ug/L)all year
Arsenic, total [as As]daily maximumreport only (ug/L)all year
Beryllium, total [as Be]monthly averagereport only (ug/L)all year
Beryllium, total [as Be]daily maximumreport only (ug/L)all year
Cadmium, total [as Cd]monthly averagereport only (ug/L)all year
Cadmium, total [as Cd]daily maximumreport only (ug/L)all year
Chromium, total [as Cr]monthly averagereport only (ug/L)all year
Chromium, total [as Cr]daily maximumreport only (ug/L)all year
Copper, total [as Cu]monthly averagereport only (ug/L)all year
Copper, total [as Cu]daily maximumreport only (ug/L)all year
Iron, total [as Fe]monthly averagereport only (ug/L)all year
Iron, total [as Fe]daily maximumreport only (ug/L)all year
Lead, total [as Pb]monthly averagereport only (ug/L)all year
Lead, total [as Pb]daily maximumreport only (ug/L)all year
Thallium, total [as Tl]monthly averagereport only (ug/L)all year
Thallium, total [as Tl]daily maximumreport only (ug/L)all year
Nickel, total [as Ni]monthly averagereport only (ug/L)all year
Nickel, total [as Ni]daily maximumreport only (ug/L)all year
Silver, total [as Ag]monthly averagereport only (ug/L)all year
Silver, total [as Ag]daily maximumreport only (ug/L)all year
Zinc, total [as Zn]monthly averagereport only (ug/L)all year
Zinc, total [as Zn]daily maximumreport only (ug/L)all year
Antimony, total [as Sb]monthly averagereport only (ug/L)all year
Antimony, total [as Sb]daily maximumreport only (ug/L)all year
Selenium, total [as Se]monthly averagereport only (ug/L)all year
Selenium, total [as Se]daily maximumreport only (ug/L)all year
Dichlorobromomethanemonthly averagereport only (ug/L)all year
Dichlorobromomethanedaily maximumreport only (ug/L)all year
Bromoformmonthly averagereport only (ug/L)all year
Bromoformdaily maximumreport only (ug/L)all year
Chlorodibromomethanemonthly averagereport only (ug/L)all year
Chlorodibromomethanedaily maximumreport only (ug/L)all year
Chloroform, dissolvedmonthly averagereport only (ug/L)all year
Chloroform, dissolveddaily maximumreport only (ug/L)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 residualmonthly average≤ .3 mg/Lall year
Chlorine, total residualdaily maximum≤ .5 mg/Lall year
Chlorine, total residualmonthly average≤ .1 lb/dall year
Chlorine, total residualdaily maximum≤ .17 lb/dall year
Mercury, total [as Hg]monthly averagereport only (ug/L)all year
Mercury, total [as Hg]daily maximumreport only (ug/L)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/ID0021237 · MCP: https://passage-data.com/mcp