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City water profile

Water hardness in Collinsville

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

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.

Collinsville

OK1021505 · Surface water · 5,400 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 (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 mg/L
Action level
0.015 mg/L

0% of the listed benchmark

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

Copper (90th percentile)

EPA SDWIS Lead and Copper Rule samples

Above action level
Reported level
2.1 mg/L
Action level
1.3 mg/L

162% of the listed benchmark

Monitoring period: Jul 1, 1992 to Dec 31, 1992

Violation history (25)
Imported violation history for Collinsville
RuleStatusPeriod
Nitrate-NitriteArchivedJan 1, 2025 to Dec 31, 2025
LEAD AND COPPER RULE REVISIONSHealth-basedResolvedOct 17, 2024 to Jul 15, 2025
LEAD AND COPPER RULE REVISIONSResolvedOct 17, 2024 to Jul 15, 2025
Interim Enhanced Surface Water Treatment RuleResolvedJul 1, 2023 to Jul 31, 2023
1,2,4-TrichlorobenzeneArchivedJan 1, 2023 to Dec 31, 2025
DICHLOROMETHANEArchivedJan 1, 2023 to Dec 31, 2025
o-DichlorobenzeneArchivedJan 1, 2023 to Dec 31, 2025
p-DichlorobenzeneArchivedJan 1, 2023 to Dec 31, 2025
Vinyl chlorideArchivedJan 1, 2023 to Dec 31, 2025
trans-1,2-DichloroethyleneArchivedJan 1, 2023 to Dec 31, 2025
1,2-DichloroethaneArchivedJan 1, 2023 to Dec 31, 2025
1,1,1-TrichloroethaneArchivedJan 1, 2023 to Dec 31, 2025
1,2-DichloropropaneArchivedJan 1, 2023 to Dec 31, 2025
1,1,2-TrichloroethaneArchivedJan 1, 2023 to Dec 31, 2025
CHLOROBENZENEArchivedJan 1, 2023 to Dec 31, 2025
BenzeneArchivedJan 1, 2023 to Dec 31, 2025
TolueneArchivedJan 1, 2023 to Dec 31, 2025
StyreneArchivedJan 1, 2023 to Dec 31, 2025
TrichloroethyleneArchivedJan 1, 2023 to Dec 31, 2025
EthylbenzeneArchivedJan 1, 2023 to Dec 31, 2025
Xylenes, TotalArchivedJan 1, 2023 to Dec 31, 2025
TetrachloroethyleneArchivedJan 1, 2023 to Dec 31, 2025
cis-1,2-DichloroethyleneArchivedJan 1, 2023 to Dec 31, 2025
1,1-DichloroethyleneArchivedJan 1, 2023 to Dec 31, 2025
Carbon tetrachlorideArchivedJan 1, 2023 to Dec 31, 2025

City summary

What the indexed records say

Collinsville has 1 published ZIP profile across Tulsa County. No qualifying nearby hardness observation is available for the city.

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 hard0 ZIPs
Hard0 ZIPs
Very hard0 ZIPs

0 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
— miles
Profiles with evidence
0/1

Confidence labels

High: 0Moderate: 0Low: 0

Observation window: unavailable to unavailable.

ZIP directory

Water reports in Collinsville

Open a ZIP for site-level provenance and measurements.

ZIP code

74021

No estimate

—

Nearest site
— mi
Confidence
—

View full ZIP evidence →

Practical next steps

Move from index to evidence

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

Questions people ask

About water in Collinsville

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.