City water profile

Water hardness in Arrow Rock

Find official utility reports, understand hardness, and check the water system serving your home in Arrow Rock, Missouri.

Utility-reported hardness

Not yet available

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State comparison: Unavailable
Evidence comparison rank: —
Matched utilities: 1
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.

Arrow Rock Pws

MO2010029 · Groundwater · 235 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 (2)

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: 0.0017 mg/L
Action level: 0.015 mg/L

11% of the listed benchmark

Monitoring period: Jan 1, 2023 to Dec 31, 2025

TTHM

EPA SDWIS reported health-based violation

Reported violation

Reported level: 88 UG/L
Maximum contaminant level: 0.08 UG/L

110000% of the listed benchmark

Monitoring period: Jan 1, 2026 to Mar 31, 2026

Violation history (15)

Imported violation history for Arrow Rock Pws
Rule	Status	Period
TTHMHealth-based	Archived	Jan 1, 2026 to Mar 31, 2026
TTHMHealth-based	Archived	Oct 1, 2025 to Dec 31, 2025
Public Notice	Resolved	Jul 3, 2025 to Nov 18, 2025
LEAD AND COPPER RULE REVISIONS	Unaddressed	Jul 2, 2025
TTHMHealth-based	Archived	Jul 1, 2025 to Sep 30, 2025
Revised Total Coliform Rule	Resolved	Apr 1, 2025 to Apr 30, 2025
TTHMHealth-based	Resolved	Jan 1, 2025 to Mar 31, 2025
Revised Total Coliform Rule	Resolved	Nov 1, 2024 to Nov 30, 2024
Total Haloacetic Acids (HAA5)	Resolved	Jul 1, 2024 to Sep 30, 2024
TTHM	Resolved	Jul 1, 2024 to Sep 30, 2024
TTHM	Resolved	Jan 1, 2023 to Mar 31, 2023
Total Haloacetic Acids (HAA5)	Resolved	Jan 1, 2023 to Mar 31, 2023
Total Haloacetic Acids (HAA5)	Resolved	Oct 1, 2022 to Dec 31, 2022
TTHM	Resolved	Oct 1, 2022 to Dec 31, 2022
Revised Total Coliform Rule	Resolved	Jun 1, 2021 to Jun 30, 2021

City summary

What the indexed records say

Arrow Rock has 1 published ZIP profile across Saline County. The regional-evidence median is 234 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: 13.5 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 0Low: 1

Observation window: Jul 28, 2016 to Jun 20, 2018.

ZIP directory

Water reports in Arrow Rock

Open a ZIP for site-level provenance and measurements.

ZIP code

65320

Very Hard

233.5 PPM

Nearest site: 13.5 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 Missouri communities

Emma

Saline County

106 PPM median

Gilliam

Saline County

234 PPM median

Malta Bend

Saline County

182 PPM median

Marshall

Saline County

234 PPM median

Miami

Saline County

182 PPM median

Nelson

Saline County

285 PPM median

Search all 504 Missouri cities →

Questions people ask

About water in Arrow Rock

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.