Is Calvert tap water safe to drink?
- Calvert CCD, TX
- Bremond CCD, TX
- Calvert
The short answer for Calvert
Calvert tap water has lithium above EPA guidelines at 3.8× the limit (tested October 2025). See the full report with all tested compounds and filter options.
The health risk for Calvert
- lithium above limit.
lithium was detected above EPA limits. These filters are independently certified to reduce common drinking-water contaminants.
Here's what actually removes PFAS from your water
The right filter eliminates PFAS at the tap. But not all filters do - and the type you choose matters for your home.
Common pitchers like Brita do not remove PFAS. You need a filter independently certified to NSF P473 (for pitcher filters) or NSF/ANSI 58 (for reverse osmosis systems). All three options below carry the relevant certification.
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| lithium Tested: October 2025 · Distribution pumps at well ground storage |
37.800 µg/L | 10 µg/L | 278% above limit |
View all tested compounds
Distribution pumps at well ground storage · Tested: Multiple dates
| Compound | Measurement | EPA Limit | Comparison |
|---|---|---|---|
| lithium | 37.800 µg/L | 10 µg/L | 278% above limit |
| PFHxS | <0.003 µg/L | 0.004 µg/L | Below limit |
| HFPO-DA | <0.005 µg/L | 0.01 µg/L | Below limit |
| PFNA | <0.004 µg/L | 0.01 µg/L | Below limit |
| PFHxA | <0.003 µg/L | 3 µg/L | Below limit |
| PFBA | <0.005 µg/L | 6 µg/L | Below limit |
| 11Cl-PF3OUdS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 4:2 FTS | <0.003 µg/L | 0.003 µg/L | Below limit |
| 6:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 8:2 FTS | <0.005 µg/L | 0.005 µg/L | Below limit |
| 9Cl-PF3ONS | <0.002 µg/L | 0.002 µg/L | Below limit |
| ADONA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFBS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFDoA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFHpS | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFOA | <0.004 µg/L | 0.004 µg/L | Below limit |
| PFOS | <0.004 µg/L | 0.004 µg/L | Below limit |
| PFPeA | <0.003 µg/L | 0.003 µg/L | Below limit |
| PFTrDA | <0.007 µg/L | 0.007 µg/L | Below limit |
| PFUnA | <0.002 µg/L | 0.002 µg/L | Below limit |
Water utilities serving ZIP 77837
Service area boundaries are approximate and based on state filings or modeled estimates. Contact your utility to confirm exact service at a specific address.
- CITY OF CALVERTAction advised
Frequently Asked Questions about ZIP 77837 Tap Water
What contaminants are above EPA limits in ZIP 77837?
ZIP 77837 has lithium above EPA health guidelines in the latest available data at 3.8x the EPA guideline. The full table on this page lists every tested compound and its measured level.
Will boiling ZIP 77837 tap water remove lithium?
No. Boiling tap water does not remove lithium. Lithium is a dissolved mineral, so heat does not break it down and evaporation can actually concentrate it. Reverse osmosis (NSF/ANSI 58) is the most reliable at-home option for reducing lithium.
Do basic pitcher filters remove lithium?
Standard pitcher filters are not certified to reduce lithium. Reverse osmosis (NSF/ANSI 58) is the most widely available home option for reducing lithium in drinking water.
Who provides tap water in ZIP 77837?
Public records identify CITY OF CALVERT as a primary water system associated with ZIP 77837. Service boundaries can vary by address, so confirm exact service with the utility.
When was ZIP 77837 tap water last tested?
The most recent test date used in this report is October 2025. EnviroClarity last refreshed this page on 2026-05-05.
Where can I find the official water quality report for ZIP 77837?
Every U.S. public water system is required to publish an annual Consumer Confidence Report (CCR). Contact CITY OF CALVERT or visit their website for the latest official report covering ZIP 77837. The EPA also maintains a national CCR locator.
Check another ZIP code
Nearby ZIP reports
Data reflects publicly reported utility records from EPA datasets and local utility disclosures. This information is educational and not medical advice.