ZipCheckup grade for 77493: A.
Checked records flag no major concern; missing data is unknown.
Katy, TX (77493): 14 Violations Recorded for Mapped Water Systems - 87/100
EPA data combined for 22 water systems mapped to this ZIP (largest mapped system: City of Katy)
EPA records for the water systems mapped to 77493 in Katy, TX contain 14 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 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 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.0027 mg/L is below the EPA action level for water systems; 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 674 cumulative NFIP claim records. This historical count is not a current property-risk verdict.
Get updates when new water-quality data is available for your area
Free alerts when new EPA data affects ZIP code 77493. No spam - just safety updates.
Unsubscribe anytime. We only send updates when your safety score changes. See our Privacy Policy.
See incorrect data? Let us know
Safety records for Katy (77493) identify 1 elevated condition - all fall in the high-priority category, with the critical-finding count for this ZIP at zero.
Score Breakdown
Overall Home Safety Score: 87/100
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) HIGH
Your Water System
ZIP code 77493 in Katy, Texas is mapped to the water system City of Katy (EPA ID: TX1010017). This system provides water to approximately 25,253 people from groundwater sources.
There are 22 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| City of Katy | TX1010017 | 25,253 | Groundwater |
| Harris County Municipal Utility District 64 | TX1011513 | 6,726 | Groundwater |
| Harris County Municipal Utility District 536 | TX1013515 | 4,188 | Groundwater |
| Harris County Municipal Utility District 495 | TX1013532 | 5,007 | Groundwater |
| Harris County Municipal Utility District 449 | TX1013372 | 7,179 | Groundwater |
Other Water Quality Reports in Texas
- 73301 (Austin)
- 73344 (Austin)
- 73960 (Texhoma)
- 75001 (Addison) - 2 violations recorded for mapped water systems
- 75002 (Allen) - 14 violations recorded for mapped water systems
- 75006 (Carrollton) - 2 violations recorded for mapped water systems
- 75007 (Carrollton) - 1 violation recorded for mapped water systems
- 75009 (Celina) - 18 violations recorded for mapped water systems
- 75010 (Carrollton) - 1 violation recorded for mapped water systems
- 75011 (Carrollton)
- 75013 (Allen)
- 75014 (Irving)
- 75015 (Irving)
- 75016 (Irving)
- 75017 (Irving)
- 75019 (Coppell) - 5 violations recorded for mapped water systems
- 75020 (Denison) - 38 violations recorded for mapped water systems
- 75021 (Denison) - 30 violations recorded for mapped water systems
- 75022 (Flower Mound) - 18 violations recorded for mapped water systems
- 75023 (Plano)
Nearby Water Quality Reports
- 77491 (Katy) - 6 mi
- 77492 (Katy) - 6 mi
- 77449 (Katy) - 6 mi - 24 violations recorded for mapped water systems
- 77433 (Cypress) - 8 mi - 15 violations recorded for mapped water systems
- 77494 (Katy) - 9 mi - 23 violations recorded for mapped water systems
- 77423 (Brookshire) - 10 mi - 20 violations recorded for mapped water systems
- 77094 (Houston) - 10 mi - 1 violation recorded for mapped water systems
- 77084 (Houston) - 10 mi - 13 violations recorded for mapped water systems
- 77450 (Katy) - 10 mi - 2 violations recorded for mapped water systems
- 77413 (Barker) - 10 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for City of Katy (TX1010017) 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.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 77493.
Detected compounds: PFHxA, PFPeA, PFBA, PFBS, PFHxS.
Highest measured level: 0.0099 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 (7) OK
Cost & Community (9) OK
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Katy
Based on local data for ZIP 77493, 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 Katy has 674 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 Texas 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 77493 safe to drink?
EPA SDWIS records 14 violations since 2021 across the water systems mapped to ZIP 77493 (primary system: City of Katy), including 0 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 77493's water come from?
The recorded water source for City of Katy, a system mapped to ZIP code 77493, is Groundwater. This system serves approximately 25,253 people.
How does Katy water compare to the national average?
Katy's Home Safety Score ranks better than 80% of U.S. ZIP codes, and at or above 58% within Texas.
How can I get my water tested in Katy?
If City of Katy 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 77493 tap water?
The Lead and Copper Rule record selected for 77493 reports a 90th-percentile lead result of 0.00269 mg/L for a water system mapped to this ZIP (record date 2023-12-31). 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 77493?
77493 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Harris 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 77493's water?
Yes, PFAS have been detected in samples from water systems mapped to 77493. 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 77493?
FEMA records contain 674 flood insurance claims filed in ZIP code 77493; the recorded rated-zone value (the most frequent one if there are several claims) is X, which is claims evidence and may differ from the current FEMA map zone for a property. This is a substantial claim history, but claim count is not a count of distinct events or properties. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Katy, TX (77493): 14 Violations Recorded for Mapped Water Systems - 87/100. https://zipcheckup.com/report/77493/
@misc{zipcheckup-report-77493,
author = {{ZipCheckup}},
title = {{Katy, TX (77493): 14 Violations Recorded for Mapped Water Systems - 87/100}},
year = {2026},
url = {https://zipcheckup.com/report/77493/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 77493
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 77491 | Katy, TX | 5.7 mi | N/A | 0 |
| 77492 | Katy, TX | 5.7 mi | N/A | 0 |
| 77449 | Katy, TX | 6.1 mi | N/A | 24 |
| 77433 | Cypress, TX | 7.7 mi | B | 15 |
| 77494 | Katy, TX | 8.8 mi | N/A | 23 |
| 77423 | Brookshire, TX | 9.7 mi | N/A | 20 |
| 77094 | Houston, TX | 9.8 mi | A | 1 |
| 77084 | Houston, TX | 10.2 mi | C | 13 |
| 77450 | Katy, TX | 10.3 mi | N/A | 2 |
| 77413 | Barker, TX | 10.4 mi | N/A | 0 |
Nearby ZIP Code Reports
2026 Rankings for Your Area
Overall safety breakdown
Home Safety Score →Find the right water filter
Water Filter Matcher →Compare filters, tests & services
Compare My Options →Compare with another ZIP
Compare Tool →2026 Rankings
ZIP 77493 scores in the top tier nationally.