ZipCheckup grade for 74021: B.
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Your top priority: match a filter's certification to the violations (20 health-based violations). Check your ZIP → NSF certified filters
Collinsville, OK (74021): 20 Health-Based Violations Recorded for Mapped Water Systems - 83/100
EPA data combined for 6 water systems mapped to this ZIP (largest mapped system: Washington Company Rwd #3 (new,#1))
Health-based violation records by water system:
EPA records for the water systems mapped to 74021 in Collinsville, OK contain 69 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 20 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 20 health-based violations and 49 non-health-based (since 2021).
- Lead The reported 90th-percentile lead result is below the laboratory reporting limit, not a measured zero; EPA's health goal for lead is zero.
- PFAS PFAS detected in UCMR5 sampling; see the PFAS section for each compound, compared with the federal PFAS MCL where one exists.
- Radon EPA Zone 3 - county-level radon potential, not evidence of a low home result.
- Flood 37 cumulative NFIP claim records. Check the current FEMA map for a specific address.
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Safety data compiled for 74021 in Collinsville produces two severity tiers of concern: one condition is classified as critical - the highest designation in the record - while 1 additional finding fall into the high-priority tier, each independently sourced and described in the cards below.
Score Breakdown
Overall Home Safety Score: 83/100
This is the published model score. Component and domain values are shown independently; they are not added together on this page.
Canonical components
Required domains
Coverage: 4 of 4 components and 3 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (8) CRITICAL
Your Water System
ZIP code 74021 in Collinsville, Oklahoma is mapped to the water system Washington Company Rwd #3 (new,#1) (EPA ID: OK1021418). This system provides water to approximately 25,375 people from surface water sources.
There are 6 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Washington Company Rwd #3 (new,#1) | OK1021418 | 25,375 | Surface water |
| Collinsville | OK1021505 | 5,400 | Surface water |
| Rogers Company Rwd # 3 Lake Plant | OK1021513 | 10,470 | Surface water |
| Rogers Company Rwd # 5 | OK1021507 | 11,782 | Surface water |
| Rogers Company Rwd # 4 | OK1021506 | 7,725 | Surface water |
Other Water Quality Reports in Oklahoma
- 73001 (Albert)
- 73002 (Alex) - 39 violations recorded for mapped water systems
- 73003 (Edmond)
- 73004 (Amber) - 166 violations recorded for mapped water systems
- 73005 (Anadarko) - 102 violations recorded for mapped water systems
- 73006 (Apache) - 39 violations recorded for mapped water systems
- 73007 (Arcadia) - 30 violations recorded for mapped water systems
- 73008 (Bethany) - 7 violations recorded for mapped water systems
- 73009 (Binger) - 14 violations recorded for mapped water systems
- 73010 (Blanchard) - 677 violations recorded for mapped water systems
- 73011 (Bradley) - 105 violations recorded for mapped water systems
- 73012 (Edmond) - 8 violations recorded for mapped water systems
- 73013 (Edmond) - 8 violations recorded for mapped water systems
- 73014 (Calumet) - 90 violations recorded for mapped water systems
- 73015 (Carnegie) - 6 violations recorded for mapped water systems
- 73016 (Cashion) - 195 violations recorded for mapped water systems
- 73017 (Cement) - 109 violations recorded for mapped water systems
- 73018 (Chickasha) - 191 violations recorded for mapped water systems
- 73019 (Norman) - 3 violations recorded for mapped water systems
- 73020 (Choctaw) - 290 violations recorded for mapped water systems
Nearby Water Quality Reports
- 74082 (Vera) - 6 mi
- 74055 (Owasso) - 6 mi - 35 violations recorded for mapped water systems
- 74156 (Tulsa) - 8 mi
- 74073 (Sperry) - 9 mi - 15 violations recorded for mapped water systems
- 74070 (Skiatook) - 9 mi - 94 violations recorded for mapped water systems
- 74117 (Tulsa) - 9 mi - 8 violations recorded for mapped water systems
- 74053 (Oologah) - 10 mi - 35 violations recorded for mapped water systems
- 74130 (Tulsa) - 11 mi - 8 violations recorded for mapped water systems
- 74126 (Tulsa) - 12 mi - 7 violations recorded for mapped water systems
- 74116 (Tulsa) - 13 mi - 29 violations recorded for mapped water systems
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Washington Company Rwd #3 (new,#1) (OK1021418) on EPA.gov.
4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
Compliance History
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 74021.
Detected compounds: PFBA.
Highest measured level: 0.0056 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (11) HIGH
Home & Infrastructure (6) OK
Cost & Community (9) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Collinsville
Based on local data for ZIP 74021, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Home & Flood Insurance
The ZIP code for this report in Collinsville has 37 FEMA flood claims on record. Standard homeowner policies don't cover flood damage - make sure you're protected.
Typical cost: Flood insurance: premiums vary by property and flood zone; request a quote
Check Your Flood Zone (Free)FEMA flood map lookup - see if your property is in a flood zone
Free tip: Check your FEMA flood zone at msc.fema.gov (free lookup)
Roofing Inspection & Repair
Active weather alerts in Oklahoma increase the risk of roof damage from hail and high winds. A professional inspection can identify vulnerabilities.
Typical cost: Roof inspection: typically $75–$300; repairs $300–$1,500
Estimate Your Home Insurance NeedsService recommendations are based on public data for this ZIP code (FEMA, Census ACS, NWS). Actual needs vary by property. By calling, your information will be shared with an independent service provider. ZipCheckup may receive compensation. Cost estimates are approximate and vary by property, condition, and contractor.
Frequently Asked Questions
Is the tap water in 74021 safe to drink?
EPA SDWIS records 69 violations since 2021 across the water systems mapped to ZIP 74021 (primary system: Washington Company Rwd #3 (new,#1)), including 20 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 74021's water come from?
The recorded water source for Washington Company Rwd #3 (new,#1), a system mapped to ZIP code 74021, is Surface water. This system serves approximately 25,375 people.
How does Collinsville water compare to the national average?
Collinsville's Home Safety Score ranks better than 67% of U.S. ZIP codes, and lower than 77% of ZIP codes within Oklahoma.
How can I get my water tested in Collinsville?
If Washington Company Rwd #3 (new,#1) supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
What is the radon risk for 74021?
74021 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Tulsa County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 74021's water?
Yes, PFAS have been detected in samples from water systems mapped to 74021. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
What does the NFIP claim history show for ZIP 74021?
FEMA records contain 37 flood insurance claims filed in ZIP code 74021; the recorded rated-zone value (the most frequent one if there are several claims) is A, which is claims evidence and may differ from the current FEMA map zone for a property. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Collinsville, OK (74021): 20 Health-Based Violations Recorded for Mapped Water Systems - 83/100. https://zipcheckup.com/report/74021/
@misc{zipcheckup-report-74021,
author = {{ZipCheckup}},
title = {{Collinsville, OK (74021): 20 Health-Based Violations Recorded for Mapped Water Systems - 83/100}},
year = {2026},
url = {https://zipcheckup.com/report/74021/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 74021
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 74082 | Vera, OK | 5.9 mi | N/A | 0 |
| 74055 | Owasso, OK | 6.0 mi | N/A | 35 |
| 74156 | Tulsa, OK | 7.9 mi | N/A | 0 |
| 74073 | Sperry, OK | 9.0 mi | A | 15 |
| 74070 | Skiatook, OK | 9.2 mi | B | 94 |
| 74117 | Tulsa, OK | 9.5 mi | A | 8 |
| 74053 | Oologah, OK | 9.6 mi | N/A | 35 |
| 74130 | Tulsa, OK | 11.0 mi | A | 8 |
| 74126 | Tulsa, OK | 12.2 mi | A | 7 |
| 74116 | Tulsa, OK | 13.5 mi | B | 29 |
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