Calvert, TX: 4 Violations — 90/100 (2026)
1 ZIP code · 2 water systems · Updated 2026-06-03
How does Calvert tap water hold up under EPA scrutiny? Above average for TX — documented violations are uncommon and the safety grade reflects a clean overall record.
How Calvert Compares
Data: EPA SDWIS Last verified: 2026-06-03
What You Should Know About Calvert Water
- Your city's water systems recorded 4 violations in the past 5 years.
- Average lead level: 0.0022 mg/L.
- Homes built before 1986: 68% — older plumbing may contain lead solder.
- Estimated remediation: $1,200 per household.
- CDC health risk index: 14.68 — above typical levels.
Who Supplies Your Water in Calvert
2 independent water providers serve Calvert, TX — 2 systems appear in federal records.
Overview
We track water quality and home safety data for 1 ZIP code in Calvert, Texas (population ~1,347), covering 2 community water systems serving approximately 4,573 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Calvert: A (90/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Calvert water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0022 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 4 | 1 |
| Lead and Copper Rule | Treatment Technique | 2 | 1 |
| Consumer Confidence Report Rule | Reporting | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 77837 | A | 4 | 0 | City of Calvert |
All ZIP Codes in Calvert
- 77837 [A] — 4 violations
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Calvert
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Top Contaminants in Calvert Water
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Housing & Infrastructure in Calvert
With 68% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Because the majority of Calvert's housing predates 1986, when lead solder was banned from new plumbing, the median build year of 1974 reflects a city where lead-era plumbing materials are common rather than exceptional.
Over half of homes in Calvert were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Calvert Homeowners
Middle of the range — Calvert homeowners face a remediation share that calls for real financial attention without reaching crisis territory.
Remediation costs are moderate relative to home values in Calvert. The estimated $800–$1,800 range is manageable for most homeowners but still worth budgeting for. Home values are 50% below the Texas average.
Lead Exposure Risk for Children in Calvert
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Older stock in Calvert represents 68% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Calvert
Within the NFIP's national dataset, Calvert falls in moderate-exposure territory — 1 documented incident spanning multiple decades, with 100% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
Calvert has a moderate flood history with 1 FEMA claims averaging $3,966 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,200</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Calvert, TX