ZipCheckup grade for 73503: A.
Checked records flag no major concern; missing data is unknown.
Fort Sill, OK (73503): 1 Health-Based Violation Recorded for Mapped Water Systems - 99/100
EPA data combined for 2 water systems mapped to this ZIP (largest mapped system: Fort Sill Hqusafacfs)
Health-based violation records by water system:
EPA records for the water systems mapped to 73503 in Fort Sill, OK contain 6 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 1 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 1 health-based violation and 5 non-health-based (since 2021).
- Lead The reported 90th-percentile lead result of 0.0012 mg/L is below the EPA action level for water systems; 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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Score Breakdown
Overall Home Safety Score: 99/100
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 (7) CRITICAL
Your Water System
ZIP code 73503 in Fort Sill, Oklahoma is mapped to the water system Fort Sill Hqusafacfs (EPA ID: OK3001601). This system provides water to approximately 23,000 people from surface water sources.
There are 2 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Fort Sill Hqusafacfs | OK3001601 | 23,000 | Surface water |
| Caddo Company Rwd #3 | OK2000816 | 3,900 | 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
- 73507 (Lawton) - 2 mi - 11 violations recorded for mapped water systems
- 73502 (Lawton) - 4 mi
- 73506 (Lawton) - 4 mi
- 73505 (Lawton) - 4 mi - 30 violations recorded for mapped water systems
- 73501 (Lawton) - 5 mi - 40 violations recorded for mapped water systems
- 73557 (Medicine Park) - 8 mi
- 73538 (Elgin) - 8 mi - 91 violations recorded for mapped water systems
- 73543 (Geronimo) - 12 mi - 19 violations recorded for mapped water systems
- 73527 (Cache) - 13 mi - 32 violations recorded for mapped water systems
- 73558 (Meers) - 13 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Fort Sill Hqusafacfs (OK3001601) 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.
UCMR 5 PFAS monitoring: no reportable detections in available records
Available federal UCMR5 records for water systems mapped to ZIP code 73503 show no PFAS detections among the compounds tested, at the program's reporting levels.
The EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5) required community and non-transient non-community water systems serving 3,300 or more people to test for 29 PFAS compounds and lithium between 2023 and 2025. Systems with no detections at the federal minimum reporting level had no results at or above that reporting level.
Environmental Hazards (10) MODERATE
Home & Infrastructure (6) OK
Cost & Community (8) HIGH
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Fort Sill
Based on local data for ZIP 73503, these services may benefit homeowners in your area.
Based on local data for your area. Use the tools below to explore your options.
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 73503 safe to drink?
EPA SDWIS records 6 violations since 2021 across the water systems mapped to ZIP 73503 (primary system: Fort Sill Hqusafacfs), including 1 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 73503's water come from?
The recorded water source for Fort Sill Hqusafacfs, a system mapped to ZIP code 73503, is Surface water. This system serves approximately 23,000 people.
How does Fort Sill water compare to the national average?
Fort Sill's Home Safety Score ranks better than 91% of U.S. ZIP codes, and at or above 84% within Oklahoma.
How can I get my water tested in Fort Sill?
If Fort Sill Hqusafacfs 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.
Is lead a concern in 73503 tap water?
The Lead and Copper Rule record selected for 73503 reports a 90th-percentile lead result of 0.00116 mg/L for a water system mapped to this ZIP (record date 2024-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
What is the radon risk for 73503?
73503 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Comanche 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). Fort Sill, OK (73503): 1 Health-Based Violation Recorded for Mapped Water Systems - 99/100. https://zipcheckup.com/report/73503/
@misc{zipcheckup-report-73503,
author = {{ZipCheckup}},
title = {{Fort Sill, OK (73503): 1 Health-Based Violation Recorded for Mapped Water Systems - 99/100}},
year = {2026},
url = {https://zipcheckup.com/report/73503/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 73503
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 73507 | Lawton, OK | 2.5 mi | A | 11 |
| 73502 | Lawton, OK | 3.6 mi | N/A | 0 |
| 73506 | Lawton, OK | 3.8 mi | N/A | 0 |
| 73505 | Lawton, OK | 4.2 mi | A | 30 |
| 73501 | Lawton, OK | 5.0 mi | A | 40 |
| 73557 | Medicine Park, OK | 7.5 mi | N/A | 0 |
| 73538 | Elgin, OK | 7.8 mi | B | 91 |
| 73543 | Geronimo, OK | 12.4 mi | A | 19 |
| 73527 | Cache, OK | 12.6 mi | A | 32 |
| 73558 | Meers, OK | 13.2 mi | N/A | 0 |
Nearby ZIP Code Reports
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