City water profile

Water hardness in Knox

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

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.

Knox Water Works

PA6160005 · Groundwater · 1,380 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: 8.0e-4 mg/L
Action level: 0.015 mg/L

5% of the listed benchmark

Monitoring period: Jul 1, 1996 to Dec 31, 1996

Violation history (8)

Imported violation history for Knox Water Works
Rule	Status	Period
Groundwater Rule	Resolved	Jan 1, 2026 to Jan 31, 2026
Nitrate	Archived	Jan 1, 2025 to Dec 31, 2025
Nitrite	Archived	Jan 1, 2025 to Dec 31, 2025
Groundwater Rule	Resolved	Aug 1, 2024 to Aug 31, 2024
Nitrite	Resolved	Jan 1, 2022 to Dec 31, 2022
Nitrate	Resolved	Jan 1, 2022 to Dec 31, 2022
Groundwater Rule	Archived	Apr 1, 2021 to Apr 30, 2021
Groundwater Rule	Resolved	Feb 1, 2021 to Feb 28, 2021

City summary

What the indexed records say

Knox has 1 published ZIP profile across Clarion County. The regional-evidence median is 93 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.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs

Moderately hard1 ZIP

Hard0 ZIPs

Very hard0 ZIPs

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: 11.3 miles
Profiles with evidence: 1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jul 24, 2019 to Apr 7, 2026.

ZIP directory

Water reports in Knox

Open a ZIP for site-level provenance and measurements.

ZIP code

16232

Moderately Hard

92.7 PPM

Nearest site: 11.3 mi
Confidence: Moderate

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 Pennsylvania communities

Montoursville

Lycoming County

99 PPM median

Bethlehem

Northampton County

99 PPM median

Philadelphia

Philadelphia County

106 PPM median

Chester

Delaware County

111 PPM median

Horsham

Montgomery County

114 PPM median

Downingtown

Chester County

115 PPM median

Search all 50 Pennsylvania cities →

Questions people ask

About water in Knox

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.