Denison, TX (75020): 38 Violations Recorded for Mapped Water Systems
EPA data combined for 7 water systems mapped to this ZIP (largest mapped system: City of Denison)
EPA records for the water systems mapped to 75020 in Denison, TX contain 38 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 38 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.0018 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
- Radon EPA Zone 3 - county-level radon potential, not evidence of a low home result.
- Flood 44 cumulative NFIP claim records. Check the current FEMA map for a specific address.
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The top classification in Denison (75020) safety data is critical - only one condition reaches that level, with no high-priority findings documented below it.
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (7) HIGH
Your Water System
ZIP code 75020 in Denison, Texas is mapped to the water system City of Denison (EPA ID: TX0910003). This system provides water to approximately 27,500 people from surface water sources.
There are 7 community water systems serving this area.
Lead & Copper in Your Water
The EPA requires water systems to monitor lead and copper levels under the Lead and Copper Rule.
| Metal | Measured Level | EPA Action Level | Status | Sample Date or Period |
|---|---|---|---|---|
| Copper | Action-level exceedance on record | 1.3 mg/L | Exceeds action level | Not present in ZipCheckup accepted source data |
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| City of Denison | TX0910003 | 27,500 | Surface water |
| City of Pottsboro | TX0910004 | 2,874 | Surface water |
| City of Sherman | TX0910006 | 43,645 | Surface water |
| Starr Water Supply Corporation | TX0910046 | 3,100 | Groundwater |
| Tanglewood on Texoma | TX0910052 | 4,341 | Surface water |
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
- 75021 (Denison) - 30 violations recorded for mapped water systems
- 75022 (Flower Mound) - 18 violations recorded for mapped water systems
- 75023 (Plano)
- 75024 (Plano) - 1 violation recorded for mapped water systems
Nearby Water Quality Reports
- 75021 (Denison) - 2 mi - 30 violations recorded for mapped water systems
- 75090 (Sherman) - 8 mi - 66 violations recorded for mapped water systems
- 75091 (Sherman) - 8 mi
- 74733 (Colbert, OK) - 8 mi - 109 violations recorded for mapped water systems
- 75092 (Sherman) - 8 mi - 94 violations recorded for mapped water systems
- 74731 (Cartwright, OK) - 8 mi - 26 violations recorded for mapped water systems
- 75076 (Pottsboro) - 9 mi - 47 violations recorded for mapped water systems
- 74753 (Platter, OK) - 11 mi
- 74747 (Kemp, OK) - 11 mi - 83 violations recorded for mapped water systems
- 75414 (Bells) - 11 mi - 23 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 City of Denison (TX0910003) 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.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 75020. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.
Detected compounds: PFHxS, PFBS, PFBA, PFHxA, PFPeS, PFPeA.
Highest measured level: 0.028 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) MODERATE
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 Denison
Based on local data for ZIP 75020, 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 Denison has 44 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)
Gutter Installation & Repair
The median home in 75020 was built around 1977. 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 Denison is 1977; 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 1977 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 75020 safe to drink?
EPA SDWIS records 38 violations since 2021 across the water systems mapped to ZIP 75020 (primary system: City of Denison), 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 75020's water come from?
The recorded water source for City of Denison, a system mapped to ZIP code 75020, is Surface water. This system serves approximately 27,500 people.
How can I get my water tested in Denison?
If City of Denison 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 75020 tap water?
The Lead and Copper Rule record selected for 75020 reports a 90th-percentile lead result of 0.00182 mg/L for a water system mapped to this ZIP (record date 2025-12-31). 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 75020?
75020 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Grayson 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 75020's water?
Yes, PFAS have been detected in samples from water systems mapped to 75020. One or more PFAS results are above the level of a federal PFAS MCL with compliance required from 2029. 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 75020?
FEMA records contain 44 flood insurance claims filed in ZIP code 75020; 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. Claim records do not establish current property risk. Review FEMA's map for the specific property.
How to cite this page
ZipCheckup. (2026). Denison, TX (75020): 38 Violations Recorded for Mapped Water Systems. https://zipcheckup.com/report/75020/
@misc{zipcheckup-report-75020,
author = {{ZipCheckup}},
title = {{Denison, TX (75020): 38 Violations Recorded for Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/75020/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 75020
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 75021 | Denison, TX | 2.5 mi | N/A | 30 |
| 75090 | Sherman, TX | 7.8 mi | N/A | 66 |
| 75091 | Sherman, TX | 8.3 mi | N/A | 0 |
| 74733 | Colbert, OK | 8.4 mi | N/A | 109 |
| 75092 | Sherman, TX | 8.4 mi | N/A | 94 |
| 74731 | Cartwright, OK | 8.5 mi | N/A | 26 |
| 75076 | Pottsboro, TX | 9.2 mi | N/A | 47 |
| 74753 | Platter, OK | 11.2 mi | N/A | 0 |
| 74747 | Kemp, OK | 11.3 mi | N/A | 83 |
| 75414 | Bells, TX | 11.4 mi | N/A | 23 |
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