Hard water in Two Rivers, WI
Reported by Two Rivers Waterworks · August 2022
- WI typical
- 170 mg/L
- EPA health violations since 2016
- 1
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in Two Rivers carries roughly 136 mg/L of dissolved calcium and magnesium, or 8.0 grains per gallon. That is hard water. The number comes from Two Rivers Waterworks, dated August 2022.
At 136 mg/L, Two Rivers is 34 mg/L below the typical Wisconsin figure of 170. Of the 10 nearest cities we track, 3 have softer water and 6 have harder. The range nearby runs from 73 mg/L in Kimberly to 202 in Sheboygan.
What 136 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.
What to do about it
At 136 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 8.0 gpg = 1,789 grains a day. A 24,000-grain unit regenerates about every 13 days.
EPA record for Two Rivers's water system
1 health-based violation since 2016
Serves about 11,270 people from surface water.
- Health-based
- 1
- Monitoring or reporting
- 70
- Open now
- 0
| Contaminant or rule | Violations | Period | Status |
|---|---|---|---|
| Lead and Copper Rulecorrosion control and lead sampling | 1 | 2024 | Resolved |
Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.
Questions
Is Two Rivers water hard?
Yes. It measures about 136 mg/L (8.0 grains per gallon), which the USGS classes as hard.
What is the water hardness in Two Rivers in grains per gallon?
About 8.0 gpg. One grain per gallon equals 17.1 mg/L, so 136 mg/L divided by 17.1 gives 8.0.
What size water softener do I need in Two Rivers?
For 3 people using 75 gallons each per day, 8.0 gpg works out to about 1,789 grains a day. A 24,000-grain softener covers that with a regeneration about every 13 days.
Has the Two Rivers water system had EPA violations?
EPA records show 1 health-based violation for Two Rivers Waterworks since 2016, involving Lead and Copper Rule. There were also 70 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Manitowoc156 mg/LHard
- Sheboygan202 mg/LVery hard
- Allouez136 mg/LHard
- De Pere194 mg/LVery hard
- Green Bay137 mg/LHard
- Little Chute87 mg/LModerately hard
- Kimberly73 mg/LModerately hard
- Suamico196 mg/LVery hard
- Appleton81 mg/LModerately hard
- Menasha166 mg/LHard
Hardness data: TapWaterData US Water Hardness (utility report, August 3, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.