City water profile

Water hardness in Arena

Find official utility reports, understand hardness, and check the water system serving your home in Arena, Wisconsin.

Utility-reported hardness

Not yet available

Check your provider and source →

State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 2
Active health records: 0

Your tap water

What does the utility report?

Match the utility name to your water bill. These results describe the utility’s water, not a test at your home. A ZIP can include several water systems.

Utility hardness unavailable in this index

Nearby river or groundwater samples cannot tell us the hardness coming out of your tap. Ask your water provider for total hardness as CaCO₃, or test it at home.

Find an official utility report →

Convert a hardness result →Test your tap →

Match the name on your water bill

Your utility’s measurements and compliance records

These are possible serving systems. A record for one system does not apply to every home in this ZIP. Confirm your provider before interpreting a measurement or notice. Federal records can lag current utility notices.

EPA snapshot: 2026Q2. Historical window begins Jan 1, 2021.

Arena Waterworks

WI1250073 · Groundwater · 877 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0011 mg/L
Action level: 0.015 mg/L

7% of the listed benchmark

Monitoring period: Jun 1, 2023 to Sep 30, 2023

Violation history (0)

No record returned in this imported window. This is not a guarantee of tap-water safety.

Bit O Green Llc Mhp

WI1250207 · Groundwater · 49 people served system-wide

The system names this served city; Census place overlap links the city to this ZCTA.

No active health-based record in this imported snapshot

Find this utility’s official report →

Measurements (1)

An action level is a regulatory trigger, not a pass/fail health boundary. A reported zero is the value in the source record and does not establish that lead is absent at your tap.

Lead (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Below action level

Reported level: 0.0019 mg/L
Action level: 0.015 mg/L

13% of the listed benchmark

Monitoring period: Jun 1, 2025 to Sep 30, 2025

Violation history (54)

Imported violation history for Bit O Green Llc Mhp
Rule	Status	Period
Revised Total Coliform Rule	Resolved	Aug 1, 2025 to Aug 31, 2025
Nitrate	Resolved	Apr 1, 2025 to Jun 30, 2025
Nitrate	Resolved	Jul 1, 2024 to Sep 30, 2024
Lead and Copper Rule	Resolved	Jun 1, 2024 to Sep 25, 2025
Endrin	Resolved	Jan 1, 2024 to Dec 31, 2024
Picloram	Resolved	Jan 1, 2024 to Dec 31, 2024
BHC-GAMMA	Resolved	Jan 1, 2024 to Dec 31, 2024
Toxaphene	Resolved	Jan 1, 2024 to Dec 31, 2024
Endothall	Resolved	Jan 1, 2024 to Dec 31, 2024
Glyphosate	Resolved	Jan 1, 2024 to Dec 31, 2024
OXAMYL	Resolved	Jan 1, 2024 to Dec 31, 2024
Simazine	Resolved	Jan 1, 2024 to Dec 31, 2024
Methoxychlor	Resolved	Jan 1, 2024 to Dec 31, 2024
Dinoseb	Resolved	Jan 1, 2024 to Dec 31, 2024
Hexachlorocyclopentadiene	Resolved	Jan 1, 2024 to Dec 31, 2024
Atrazine	Resolved	Jan 1, 2024 to Dec 31, 2024
Heptachlor	Resolved	Jan 1, 2024 to Dec 31, 2024
2,4-D	Resolved	Jan 1, 2024 to Dec 31, 2024
Pentachlorophenol	Resolved	Jan 1, 2024 to Dec 31, 2024
Chlordane	Resolved	Jan 1, 2024 to Dec 31, 2024
Heptachlor epoxide	Resolved	Jan 1, 2024 to Dec 31, 2024
Trichloroethylene	Resolved	Jan 1, 2024 to Dec 31, 2024
cis-1,2-Dichloroethylene	Resolved	Jan 1, 2024 to Dec 31, 2024
Benzene	Resolved	Jan 1, 2024 to Dec 31, 2024
p-Dichlorobenzene	Resolved	Jan 1, 2024 to Dec 31, 2024
Ethylbenzene	Resolved	Jan 1, 2024 to Dec 31, 2024
Toluene	Resolved	Jan 1, 2024 to Dec 31, 2024
CHLOROBENZENE	Resolved	Jan 1, 2024 to Dec 31, 2024
1,1,2-Trichloroethane	Resolved	Jan 1, 2024 to Dec 31, 2024
Carbon tetrachloride	Resolved	Jan 1, 2024 to Dec 31, 2024
1,2-Dichloroethane	Resolved	Jan 1, 2024 to Dec 31, 2024
1,1-Dichloroethylene	Resolved	Jan 1, 2024 to Dec 31, 2024
Vinyl chloride	Resolved	Jan 1, 2024 to Dec 31, 2024
1,2,4-Trichlorobenzene	Resolved	Jan 1, 2024 to Dec 31, 2024
Xylenes, Total	Resolved	Jan 1, 2024 to Dec 31, 2024
Styrene	Resolved	Jan 1, 2024 to Dec 31, 2024
1,1,1-Trichloroethane	Resolved	Jan 1, 2024 to Dec 31, 2024
HEXACHLOROBENZENE	Resolved	Jan 1, 2024 to Dec 31, 2024
Dalapon	Resolved	Jan 1, 2024 to Dec 31, 2024
Diquat	Resolved	Jan 1, 2024 to Dec 31, 2024
o-Dichlorobenzene	Resolved	Jan 1, 2024 to Dec 31, 2024
2,4,5-TP	Resolved	Jan 1, 2024 to Dec 31, 2024
Tetrachloroethylene	Resolved	Jan 1, 2024 to Dec 31, 2024
trans-1,2-Dichloroethylene	Resolved	Jan 1, 2024 to Dec 31, 2024
LASSO	Resolved	Jan 1, 2024 to Dec 31, 2024
DICHLOROMETHANE	Resolved	Jan 1, 2024 to Dec 31, 2024
Carbofuran	Resolved	Jan 1, 2024 to Dec 31, 2024
1,2-Dichloropropane	Resolved	Jan 1, 2024 to Dec 31, 2024
Lead and Copper Rule	Unaddressed	Jan 1, 2022
Public Notice	Resolved	Jan 1, 2022 to Jun 22, 2023
Public Notice	Resolved	Jan 1, 2022 to Jun 22, 2023
Revised Total Coliform Rule	Resolved	Dec 1, 2021 to Dec 31, 2021
Nitrate	Resolved	Oct 1, 2021 to Dec 31, 2021
Revised Total Coliform Rule	Resolved	Jul 1, 2021 to Jul 31, 2021

City summary

What the indexed records say

Arena has 1 published ZIP profile across Iowa County. The regional-evidence median is 283 PPM. The city does not meet the stricter comparison standard.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard0 ZIPs

Hard0 ZIPs

Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 6.4 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: May 15, 2019 to May 15, 2019.

ZIP directory

Water reports in Arena

Open a ZIP for site-level provenance and measurements.

ZIP code

53503

Very Hard

283 PPM

Nearest site: 6.4 mi
Confidence: Low

View full ZIP evidence →

Practical next steps

Move from index to evidence

1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
3. Use a measured hardness result. Confirm health concerns or treatment sizing with the right method.

Continue comparing

Other Wisconsin communities

Avoca

Iowa County

283 PPM median

Barneveld

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283 PPM median

Cobb

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283 PPM median

Dodgeville

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283 PPM median

Highland

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283 PPM median

Hollandale

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283 PPM median

Search all 479 Wisconsin cities →

Questions people ask

About water in Arena

Is the water hard?

Check the utility-reported result above when available. Nearby environmental samples cannot establish tap-water hardness. Ask your provider or test your tap.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.