Nardin, OK (74646): 14 Health-Based Violations Recorded for Mapped Water Systems
EPA data combined for 3 water systems mapped to this ZIP (largest mapped system: Blackwell Municipal Authority)
Health-based violation records by water system:
EPA records for the water systems mapped to 74646 in Nardin, OK contain 23 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 14 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 14 health-based violations and 9 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.
- Radon EPA Zone 3 - county-level radon potential, not evidence of a low home result.
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Safety & Health (6) CRITICAL
Your Water System
ZIP code 74646 in Nardin, Oklahoma is mapped to the water system Blackwell Municipal Authority (EPA ID: OK1021101). This system provides water to approximately 7,668 people from surface water sources.
There are 3 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Blackwell Municipal Authority | OK1021101 | 7,668 | Surface water |
| Kay County Rural Water District 7 | OK3003601 | 920 | Surface water |
| Tonkawa | OK2003603 | 3,299 | Groundwater |
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
- 74636 (Deer Creek) - 5 mi
- 74631 (Blackwell) - 8 mi - 23 violations recorded for mapped water systems
- 74632 (Braman) - 11 mi - 3 violations recorded for mapped water systems
- 74643 (Lamont) - 11 mi - 7 violations recorded for mapped water systems
- 74653 (Tonkawa) - 12 mi - 10 violations recorded for mapped water systems
- 73759 (Medford) - 16 mi - 37 violations recorded for mapped water systems
- 67140 (South Haven, KS) - 16 mi
- 74602 (Ponca City) - 18 mi
- 67022 (Caldwell, KS) - 19 mi
- 74630 (Billings) - 20 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Blackwell Municipal Authority (OK1021101) on EPA.gov.
5 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
Environmental Hazards (10) HIGH
Home & Infrastructure (6) HIGH
Possible home maintenance concerns - talk to a local expert.
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Cost & Community (7) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Nardin
Based on local data for ZIP 74646, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
Gutter Installation & Repair
The median home in 74646 was built around 1956. Aging gutters can cause foundation damage, basement flooding, and mold - a professional assessment can prevent costly repairs.
Typical cost: Gutter installation: typically $1,000–$2,500 for a standard home
Estimate Your Home Maintenance CostsWindow Replacement
The median build year of homes in Nardin is 1956; check the age and condition of your own windows. ENERGY STAR windows can save $101–$583/year on energy bills.
Typical cost: Window replacement: typically $300–$800 per window installed
Estimate Your Home Maintenance CostsRoofing Inspection & Repair
Homes built around 1956 may be on their second or third roof. A professional inspection can catch damage before leaks start.
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 74646 safe to drink?
EPA SDWIS records 23 violations since 2021 across the water systems mapped to ZIP 74646 (primary system: Blackwell Municipal Authority), including 14 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 74646's water come from?
The recorded water source for Blackwell Municipal Authority, a system mapped to ZIP code 74646, is Surface water. This system serves approximately 7,668 people.
How can I get my water tested in Nardin?
If Blackwell Municipal Authority 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 74646?
74646 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Kay County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
How to cite this page
ZipCheckup. (2026). Nardin, OK (74646): 14 Health-Based Violations Recorded for Mapped Water Systems. https://zipcheckup.com/report/74646/
@misc{zipcheckup-report-74646,
author = {{ZipCheckup}},
title = {{Nardin, OK (74646): 14 Health-Based Violations Recorded for Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/74646/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 74646
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 74636 | Deer Creek, OK | 4.5 mi | N/A | 0 |
| 74631 | Blackwell, OK | 8.1 mi | A | 23 |
| 74632 | Braman, OK | 10.6 mi | N/A | 3 |
| 74643 | Lamont, OK | 11.0 mi | N/A | 7 |
| 74653 | Tonkawa, OK | 11.6 mi | N/A | 10 |
| 73759 | Medford, OK | 15.9 mi | N/A | 37 |
| 67140 | South Haven, KS | 16.3 mi | N/A | 0 |
| 74602 | Ponca City, OK | 18.3 mi | N/A | 0 |
| 67022 | Caldwell, KS | 19.1 mi | N/A | 0 |
| 74630 | Billings, OK | 20.1 mi | N/A | 0 |
Nearby ZIP Code Reports
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