Shoal & Stem

Fort Madison, IA tap water

Supplied mostly by Rathbun Reg Water Assn (Ft Madison), plus 1 other utility. Here's what the water means for your fish.

Disinfectant

Chlorine

Your water is treated with chlorine. It slowly gases off from standing water, and any water conditioner removes it.

Safety for fish and shrimp

Nitrate (NO₃)

Supplier's figure

Up to 15 ppm (Low)

Typical 7.4 ppm

Water changes can't take your tank's nitrate below this level.

From the utility that supplies yours: Ft Madison Muni Water Works and Keokuk Municipal Water Works, which supplies Rathbun Reg Water Assn (Ft Madison); EPA monitoring data (2012–2019).

Water chemistry

General hardness

Not published yet

We haven't found this number yet. A drop test kit gives you your exact reading.

Carbonate hardness (alkalinity)

Not published yet

We haven't found this number yet. A drop test kit gives you your exact reading.

pH

Not published yet

We haven't found this number yet. A drop test kit gives you your exact reading.

  • Rathbun Reg Water Assn (Ft Madison) adds phosphate to protect pipes. It can feed algae in tanks without much plant growth.
  • Rathbun Reg Water Assn (Ft Madison) and Ft Madison Muni Water Works soften their water at the plant, so it may be softer than the local groundwater.

Who supplies Fort Madison, IA

  • Rathbun Reg Water Assn (Ft Madison)

    Serves 43% of residents · Buys water from Ft Madison Muni Water Works · Chlorine

  • Ft Madison Muni Water Works

    Serves 27% of residents · Groundwater (wells) · Chlorine

Our data comes from public records and is still incomplete. Many utilities don't publish every number, so we're adding more all the time. Your city's range is a starting point: testing your own tap is the only way to know exactly what's in it.

Tap water lookup covers US cities only for now. Want to know why it matters? Read our story on tap water.

Compiled by Shoal & Stem from public records. Free to cite with a link.

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