Community Water System · PWS TX1980002
City of Calvert
Operator location Calvert, Texas - smaller served population (≤ 999) at 962 people served; 141 SDWIS violations on record from groundwater sources.
- 962
- People served (this PWS)
- 141
- EPA violations (this PWS)
- 15
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
City of Calvert standing, high SDWIS violation third
962 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 11% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #20,218 of 29,740 among systems serving 500+.
The verdict
City of Calvert sits in the upper third of the sitemap cohort by violation count (141), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (962; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 11% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #20,218 of 29,740
- Population · /systems
- #2,320 of 3,040
- Population · TX
- 141
- Total EPA violations on record
- 11%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 549
- County
- Robertson
- School/Daycare
- No
- MCL Violations
- 10
- Monitoring Violations
- 72
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Public Notice | Other | 43 | 2024 |
| E. COLI | MR | 40 | 2017 |
| Chlorine | MR | 13 | 2017 |
| Coliform (TCR) | MR | 12 | 2015 |
| Coliform (TCR) | MCL | 10 | 2015 |
| Revised Total Coliform Rule | TT | 5 | 2017 |
| Consumer Confidence Rule | Other | 4 | 2016 |
| Lead and Copper Rule | MR | 4 | 2014 |
| Revised Total Coliform Rule | MON | 3 | 2023 |
Violation Count vs. the National Corpus
City of Calvert has 141 recorded EPA violations, 80% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 20% carry more. 11% of this system's own violations are health-based (15 of 141), and it ranks #20,218 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
141 Higher than most more violations than 80% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 29 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFPeS | 4/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 4/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFNA | 4/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 4/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOS | 4/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFUnA | 4/15/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFPeA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 4/15/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 4/15/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 4/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMBA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 4/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 4/15/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| NMeFOSAA | 4/15/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| ADONA | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 4/15/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFBA | 4/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 4/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 4/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 4/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFMPA | 4/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
Population served record for City of Calvert
EPA SDWIS lists 962 people served and 549 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS · Texas Commission on Environmental Quality (TCEQ) - Drinking Water Watch
Nationwide peers
141 violations · 962 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with City of Calvert
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Texas compares on the same EPA violation measures. Texas systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.