City water profile

Water hardness in Arvada

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

Utility-reported hardness

Not yet available

Check your provider and source →

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.

Arvada City Of

CO0130001 · Surface water · 171,610 people served system-wide

A municipal system, in-state city, and served county all agree with this Census 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: 0.0031 mg/L
Action level: 0.015 mg/L

21% of the listed benchmark

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

Violation history (4)

Imported violation history for Arvada City Of
Rule	Status	Period
Interim Enhanced Surface Water Treatment Rule	Resolved	Jun 1, 2024 to Jun 28, 2024
Interim Enhanced Surface Water Treatment Rule	Resolved	May 1, 2024 to May 31, 2024
Surface Water Treatment Rule	Resolved	Mar 1, 2024 to Mar 31, 2024
Surface Water Treatment Rule	Resolved	Feb 1, 2024 to Feb 29, 2024

City summary

What the indexed records say

Arvada has 5 published ZIP profiles across Jefferson County. The regional-evidence median is 349 PPM. The city does not meet the stricter comparison standard.

The 177.8–349 PPM range shows how much the available ZIP estimates vary within the city label. 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

Hard1 ZIP

Very hard4 ZIPs

5 of 5 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance: 8.1 miles
Profiles with evidence: 5/5

Confidence labels

High: 0Moderate: 1Low: 4

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 Colorado communities

Denver

Jefferson County

349 PPM median

Golden

Jefferson County

349 PPM median

Lakewood

Jefferson County

349 PPM median

Aurora

Arapahoe County

349 PPM median

Broomfield

Broomfield County

349 PPM median

Westminster

Adams County

349 PPM median

Search all 58 Colorado cities →

Questions people ask

About water in Arvada

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.