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Sewage treatment plant, major discharger, Alexandria, Minnesota. NPDES permit MN0040738, in force until Jul 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Specific conductance | quarterly maximum | report only (umho/cm) | Mar, Jun, Sep, Dec | D044 |
| Oxygen, dissolved [DO] | monthly minimum | report only (mg/L) | all year | D044 |
| pH | monthly minimum | ≥ 6 SU | all year | D044 |
| pH | monthly maximum | ≤ 9 SU | all year | D044 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | D044 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | D044 |
| Solids, total suspended | monthly maximum | report only (mg/L) | May, Sep | D044 |
| Solids, total suspended | monthly average | ≤ 339 kg/d | all year | D044 |
| Solids, total suspended | maximum weekly average | ≤ 508 kg/d | all year | D044 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | D044 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | D044 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | D044 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | D044 |
| Phosphorus, total [as P] | monthly average | ≤ .25 mg/L | all year | D044 |
| Phosphorus, total [as P] | monthly average | report only (kg/d) | all year | D044 |
| Phosphorus, total [as P] | annual total | ≤ 1087 kg/yr | all year | D044 |
| Chloride [as Cl] | monthly average | ≤ 805 mg/L | all year | D044 |
| Chloride [as Cl] | daily maximum | ≤ 14925 kg/d | all year | D044 |
| Sulfate, total [as SO4] | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | D044 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | D044 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | D044 |
| Coliform, fecal MPN + membrane ftl 44.5 C | monthly geometric mean | ≤ 200 #/100mL | Apr–Oct | D044 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | D044 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | D044 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | D044 |
| Chlorine, total residual | daily maximum | ≤ .038 mg/L | Apr–Oct | D044 |
| Solids, total dissolved | quarterly maximum | report only (mg/L) | Mar, Jun, Sep, Dec | D044 |
| Mercury, dissolved [as Hg] | monthly maximum | report only (ng/L) | May, Sep | D044 |
| Mercury, total [as Hg] | monthly maximum | report only (ng/L) | May, Sep | D044 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 25 mg/L | all year | D044 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 40 mg/L | all year | D044 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 282 kg/d | all year | D044 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 452 kg/d | all year | D044 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | D044 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | D044 |
| Precipitation, total defined period/in | monthly total | report only (in) | all year | S047 |
| pH | monthly minimum | report only (SU) | all year | S047 |
| pH | monthly maximum | report only (SU) | all year | S047 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | S047 |
| Solids, total suspended | monthly maximum | report only (mg/L) | all year | S047 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | S047 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | S047 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | S047 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | S047 |
| Copper, total [as Cu] | quarterly average | report only (mg/L) | Mar, Jun, Sep, Dec | S047 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | S047 |
| Flow, in conduit or thru treatment plant | monthly maximum | report only (MGD) | all year | S047 |
| Flow, in conduit or thru treatment plant | monthly total | report only (Mgal/mo) | all year | S047 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | S047 |
| BOD, carbonaceous [5 day, 20 C] | monthly maximum | report only (mg/L) | all year | S047 |
| Transparency, secchi disc | monthly average | report only (m) | May, Oct | W045 |
| Transparency, secchi disc | monthly average | report only (m) | Jun–Sep | W045 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jun–Sep | W045 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | May, Oct | W045 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | May–Oct | W045 |
| Chlorophyll A | monthly average | report only (mg/L) | May, Oct | W045 |
| Chlorophyll A | monthly average | report only (mg/L) | Jun–Sep | W045 |
| Transparency, secchi disc | monthly average | report only (m) | Jun–Sep | W046 |
| Transparency, secchi disc | monthly average | report only (m) | May, Oct | W046 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jun–Sep | W046 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | May, Oct | W046 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | May–Oct | W046 |
| Chlorophyll A | monthly average | report only (mg/L) | May, Oct | W046 |
| Chlorophyll A | monthly average | report only (mg/L) | Jun–Sep | W046 |
| Transparency, secchi disc | monthly average | report only (m) | May, Oct | W048 |
| Transparency, secchi disc | monthly average | report only (m) | Jun–Sep | W048 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | Jun–Sep | W048 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | May, Oct | W048 |
| Sulfate, total [as SO4] | monthly average | report only (mg/L) | May–Oct | W048 |
| Chlorophyll A | monthly average | report only (mg/L) | Jun–Sep | W048 |
| Chlorophyll A | monthly average | report only (mg/L) | May, Oct | W048 |
| Parameter | New limit | From | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|---|
| Chloride [as Cl], daily maximum | 4483 kg/d | Jul 1, 2030 | tighter | 8162 kg/d (12 values) | 1.82× |
| Chloride [as Cl], monthly average | 230 mg/L | Jul 1, 2030 | tighter | 750.5 mg/L (12 values) | 3.26× |
| Copper, total [as Cu], daily maximum | 2.437 kg/d (Mar, Jun, Sep, Dec) | Jun 1, 2030 | new | — | — |
| Copper, total [as Cu], monthly average | 1.618 kg/d (Mar, Jun, Sep, Dec) | Jun 1, 2030 | new | — | — |
| Mercury, total [as Hg], daily maximum | 299 mg/d (Jan, Mar, May, Jul, Sep, Nov) | Jun 1, 2030 | new | — | — |
| Mercury, total [as Hg], monthly average | 173 mg/d (Jan, Mar, May, Jul, Sep, Nov) | Jun 1, 2030 | new | — | — |
| Phosphorus, total [as P], annual total | 665 kg/yr | Jun 1, 2030 | tighter | 543.5 kg/yr (12 values) | 0.817× |
| Phosphorus, total [as P], monthly average | 0.157 mg/L | Jun 1, 2030 | tighter | 0.115 mg/L (12 values) | 0.732× |
| Solids, total dissolved, daily maximum | 34511 kg/d (Mar, Jun, Sep, Dec) | Jun 1, 2030 | new | — | — |
| Sulfate, total [as SO4], monthly average | 2828 kg/d | Jun 1, 2030 | new | — | — |
| Zinc, total [as Zn], daily maximum | 5.283 kg/d (Mar, Jun, Sep, Dec) | Jun 1, 2030 | new | — | — |
| Zinc, total [as Zn], monthly average | 3.45 kg/d (Mar, Jun, Sep, Dec) | Jun 1, 2030 | new | — | — |
| Copper, total [as Cu], daily maximum | 2.437 kg/d (Mar, Jun, Sep, Dec) | Jul 1, 2030 | new | — | — |
| Copper, total [as Cu], monthly average | 1.618 kg/d (Mar, Jun, Sep, Dec) | Jul 1, 2030 | new | — | — |
| Mercury, total [as Hg], daily maximum | 299 mg/d (Jan, Mar, May, Jul, Sep, Nov) | Jul 1, 2030 | new | — | — |
| Mercury, total [as Hg], monthly average | 173 mg/d (Jan, Mar, May, Jul, Sep, Nov) | Jul 1, 2030 | new | — | — |
| Phosphorus, total [as P], annual total | 665 kg/yr | Jul 1, 2030 | tighter | 543.5 kg/yr (12 values) | 0.817× |
| Phosphorus, total [as P], monthly average | 0.157 mg/L | Jul 1, 2030 | tighter | 0.115 mg/L (12 values) | 0.732× |
| Solids, total dissolved, daily maximum | 34511 kg/d (Mar, Jun, Sep, Dec) | Jul 1, 2030 | new | — | — |
| Sulfate, total [as SO4], monthly average | 2828 kg/d | Jul 1, 2030 | new | — | — |
| Zinc, total [as Zn], daily maximum | 5.283 kg/d (Mar, Jun, Sep, Dec) | Jul 1, 2030 | new | — | — |
| Zinc, total [as Zn], monthly average | 3.45 kg/d (Mar, Jun, Sep, Dec) | Jul 1, 2030 | new | — | — |
Cited limits by parameter: Minnesota'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/MN0040738 · MCP: https://passage-data.com/mcp