ZipCheckup grade for 63304: C.
A mixed picture - some signals here are worth your attention.
Your top priority: review your flood insurance coverage. Check your ZIP → FloodSmart
Saint Charles, MO (63304): 2 Violations Recorded for Mapped Water Systems - 66/100
EPA data combined for 4 water systems mapped to this ZIP (largest mapped system: Mo American St Louis St Charles Counties)
EPA records for the water systems mapped to 63304 in Saint Charles, MO contain 2 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 2 violations (non-health) (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 At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
- Radon EPA Zone 2 - county-level radon potential, not a home measurement.
- Flood 134 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 63304. 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
For Saint Charles (63304), only one finding reaches the critical designation.
Score Breakdown
Overall Home Safety Score: 66/100
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) HIGH
Your Water System
ZIP code 63304 in Saint Charles, Missouri is mapped to the water system Mo American St Louis St Charles Counties (EPA ID: MO6010716). This system provides water to approximately 1,111,000 people from surface water sources.
There are 4 community water systems serving this area.
Water Systems Serving This Area
| System Name | EPA ID | Population | Source |
|---|---|---|---|
| Mo American St Louis St Charles Counties | MO6010716 | 1,111,000 | Surface water |
| St Charles County Pwsd 2 | MO6024530 | 100,587 | Surface water |
| St Peters Public Water System | MO6010719 | 52,575 | Surface water |
| Weldon Spring Heights Village Public Water System | MO6010919 | 100 | Groundwater |
Other Water Quality Reports in Missouri
- 63005 (Chesterfield) - 3 violations recorded for mapped water systems
- 63006 (Chesterfield)
- 63010 (Arnold) - 2 violations recorded for mapped water systems
- 63011 (Ballwin) - 1 violation recorded for mapped water systems
- 63012 (Barnhart) - 11 violations recorded for mapped water systems
- 63013 (Beaufort) - 6 violations recorded for mapped water systems
- 63014 (Berger) - 3 violations recorded for mapped water systems
- 63015 (Catawissa) - 4 violations recorded for mapped water systems
- 63016 (Cedar Hill) - 6 violations recorded for mapped water systems
- 63017 (Chesterfield)
- 63019 (Crystal City) - 7 violations recorded for mapped water systems
- 63020 (De Soto) - 9 violations recorded for mapped water systems
- 63021 (Ballwin) - 4 violations recorded for mapped water systems
- 63022 (Ballwin)
- 63023 (Dittmer) - 1 violation recorded for mapped water systems
- 63024 (Ballwin)
- 63025 (Eureka) - 6 violations recorded for mapped water systems
- 63026 (Fenton) - 5 violations recorded for mapped water systems
- 63028 (Festus) - 15 violations recorded for mapped water systems
- 63030 (Fletcher)
Nearby Water Quality Reports
- 63338 (Cottleville) - 2 mi
- 63376 (Saint Peters) - 3 mi - 4 violations recorded for mapped water systems
- 63303 (Saint Charles) - 4 mi - 1 violation recorded for mapped water systems
- 63346 (Flinthill) - 5 mi
- 63006 (Chesterfield) - 6 mi
- 63368 (O Fallon) - 6 mi - 2 violations recorded for mapped water systems
- 63005 (Chesterfield) - 7 mi - 3 violations recorded for mapped water systems
- 63301 (Saint Charles) - 8 mi - 1 violation recorded for mapped water systems
- 63017 (Chesterfield) - 8 mi
- 63302 (Saint Charles) - 8 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Mo American St Louis St Charles Counties (MO6010716) 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 63304. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.
Detected compounds: PFBA, PFPeA, PFHxA, PFOA.
Highest measured level: 0.0106 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 (8) OK
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Protect Your Home in Saint Charles
Based on local data for ZIP 63304, 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 Saint Charles has 134 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 Missouri 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 63304 safe to drink?
EPA SDWIS records 2 violations since 2021 across the water systems mapped to ZIP 63304 (primary system: Mo American St Louis St Charles Counties), 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 63304's water come from?
The recorded water source for Mo American St Louis St Charles Counties, a system mapped to ZIP code 63304, is Surface water. This system serves approximately 1,111,000 people.
How does Saint Charles water compare to the national average?
Saint Charles's Home Safety Score ranks better than 67% of U.S. ZIP codes, and at or above 85% within Missouri.
How can I get my water tested in Saint Charles?
If Mo American St Louis St Charles Counties 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 63304?
63304 is mapped to a county in EPA Radon Zone 2 (moderate county-level radon potential; EPA recommends testing every home), located in St. Charles 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 63304's water?
Yes, PFAS have been detected in samples from water systems mapped to 63304. 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 63304?
FEMA records contain 134 flood insurance claims filed in ZIP code 63304; the recorded rated-zone value (the most frequent one if there are several claims) is AE, 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). Saint Charles, MO (63304): 2 Violations Recorded for Mapped Water Systems - 66/100. https://zipcheckup.com/report/63304/
@misc{zipcheckup-report-63304,
author = {{ZipCheckup}},
title = {{Saint Charles, MO (63304): 2 Violations Recorded for Mapped Water Systems - 66/100}},
year = {2026},
url = {https://zipcheckup.com/report/63304/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 63304
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 63338 | Cottleville, MO | 1.7 mi | N/A | 0 |
| 63376 | Saint Peters, MO | 2.9 mi | C | 4 |
| 63303 | Saint Charles, MO | 4.4 mi | C | 1 |
| 63346 | Flinthill, MO | 4.8 mi | N/A | 0 |
| 63006 | Chesterfield, MO | 5.7 mi | N/A | 0 |
| 63368 | O Fallon, MO | 5.8 mi | C | 2 |
| 63005 | Chesterfield, MO | 7.3 mi | B | 3 |
| 63301 | Saint Charles, MO | 7.7 mi | C | 1 |
| 63017 | Chesterfield, MO | 7.7 mi | B | 0 |
| 63302 | Saint Charles, MO | 8.3 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 →