Water Quality in Houston, TX (77046)
EPA violation data for public water systems serving ZIP code 77046.
Active Health Violations
5 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 92% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
1,793
Population
67
Water Systems
68
Violations (5yr)
5
Health-Based
Location
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Water Systems Serving This Area (67)
City Of Houston
1 health-based Surface water 2,970,543 people served
1 violation (5yr)
· 1 health-based · All resolved
Lead tested: 5 ppb (limit: 15 ppb) ✓
City Of Pasadena
Purchased surface water 152,000 people served
3 violations (5yr)
Lead tested: 3.72 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 182
Groundwater 10,498 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Harris County Mud 102
Purchased surface water 10,401 people served
0 violations
Lead tested: 2 ppb (limit: 15 ppb) ✓
Chelford City Mud
Groundwater 8,917 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
North Mission Glen Mud
Purchased surface water 8,730 people served
0 violations
Lead tested: 0.8 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 134b
Purchased groundwater 7,356 people served
0 violations
Fort Bend County Mud 134c
Purchased groundwater 7,260 people served
0 violations
Mills Road Mud
Purchased surface water 6,717 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Grand Mission Mud 1
Purchased surface water 6,663 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Heatherloch Mud
Purchased surface water 6,612 people served
0 violations
Big Oaks Mud
Purchased surface water 6,450 people served
0 violations
Lead tested: 1.51 ppb (limit: 15 ppb) ✓
Grand Mission Mud 2
Purchased groundwater 6,285 people served
0 violations
Charterwood Mud
Groundwater 5,832 people served
0 violations
Lead tested: 5.6 ppb (limit: 15 ppb) ✓
Cinco Mud 8
Purchased groundwater 5,613 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Montgomery County Mud 139
Groundwater 5,523 people served
0 violations
Montgomery County Mud 112
Groundwater 5,454 people served
0 violations
Lead tested: 1.43 ppb (limit: 15 ppb) ✓
Fulshear Mud 3a
Groundwater 5,421 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Harris County Mud 46
1 health-based Groundwater 5,418 people served
3 violations (5yr)
· 1 health-based · All resolved
Chimney Hill Mud
Purchased surface water 5,409 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Rolling Creek Utility District
Purchased surface water 5,388 people served
0 violations
Montgomery County Ud 4
Groundwater 4,980 people served
0 violations
Lead tested: 2.19 ppb (limit: 15 ppb) ✓
Kleinwood Mud
1 health-based Purchased surface water 4,872 people served
2 violations (5yr)
· 1 health-based · All resolved
Lead tested: 4.34 ppb (limit: 15 ppb) ✓
Harris County Wcid 92
Groundwater 4,752 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Brazoria - Fort Bend Counties Mud 3
Groundwater 4,149 people served
0 violations
Lead tested: 0.5 ppb (limit: 15 ppb) ✓
East Montgomery County Mud 7
Purchased groundwater 4,035 people served
0 violations
Lead tested: 1.4 ppb (limit: 15 ppb) ✓
East Montgomery County Mud 6
Purchased groundwater 3,939 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Northgate Crossing Mud 2
All resolved Groundwater 3,753 people served
9 violations (5yr)
· All resolved
Fort Bend County Mud 185
Groundwater 3,663 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Harris County Mud 11
Groundwater 3,645 people served
0 violations
El Dorado Utility District
Groundwater 3,591 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 222
Purchased groundwater 3,582 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Oakmont Pud
All resolved Groundwater 3,450 people served
26 violations (5yr)
· All resolved
Lead tested: 0.63 ppb (limit: 15 ppb) ✓
Montgomery County Ud 2
Groundwater 3,381 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Terranova West Mud
All resolved Purchased surface water 3,120 people served
2 violations (5yr)
· All resolved
Lead tested: 1.24 ppb (limit: 15 ppb) ✓
Northwest Harris County Mud 29
1 health-based Groundwater 3,000 people served
3 violations (5yr)
· 1 health-based
Fort Bend County Mud 134e
Groundwater 2,733 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Montgomery County Mud 111
Purchased groundwater 2,502 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Northwest Harris County Mud 21
Purchased surface water 2,493 people served
0 violations
Lead tested: 1.39 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 218
All resolved Purchased surface water 2,412 people served
2 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Harris County Mud 213-A
Purchased surface water 1,926 people served
0 violations
Lead tested: 0.67 ppb (limit: 15 ppb) ✓
Montgomery County Mud 199
All resolved Groundwater 1,203 people served
3 violations (5yr)
· All resolved
Lead tested: 0.96 ppb (limit: 15 ppb) ✓
Luce Bayou Pud
Groundwater 1,083 people served
0 violations
Lead tested: 1.7 ppb (limit: 15 ppb) ✓
Harris County Mud 465
Groundwater 1,026 people served
0 violations
Lead tested: 0.78 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 134f
Purchased groundwater 661 people served
0 violations
Montgomery County Mud 16 White Oak Plant
All resolved Groundwater 627 people served
2 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
C Mart 333
Groundwater 600 people served
0 violations
Harris County Mud 578
Purchased surface water 576 people served
0 violations
Brazoria County Mud 87
Groundwater 387 people served
0 violations
Blaketree Mud 1
All resolved Groundwater 336 people served
1 violation (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Oxy Stratos Facility
Groundwater 300 people served
0 violations
Lago Bello Mud 1a
Groundwater 297 people served
0 violations
Pine Forest Mud
Purchased groundwater 198 people served
0 violations
Fort Bend County Wcid 8
Groundwater 126 people served
0 violations
Lead tested: 3.9 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 134d
Purchased surface water 105 people served
0 violations
Harris County Mud 461
Purchased surface water 87 people served
0 violations
Lead tested: 0.61 ppb (limit: 15 ppb) ✓
Geo Pipe Co
Groundwater 60 people served
0 violations
Fort Bend County Mud 188
Purchased groundwater 54 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fort Bend County Mud 246
All resolved Groundwater 45 people served
1 violation (5yr)
· All resolved
Lead tested: 1 ppb (limit: 15 ppb) ✓
Harris County Mud 565
Groundwater 45 people served
0 violations
Lead tested: 0.7 ppb (limit: 15 ppb) ✓
Beaver Creek Wcid 1
1 health-based Groundwater 45 people served
2 violations (5yr)
· 1 health-based
Lead tested: 2.14 ppb (limit: 15 ppb) ✓
Occidental Permian Slaughter Gasoline Pl
Groundwater 11 people served
0 violations
Fort Bend County Mud 134a
Purchased surface water 0
0 violations
Occidental Permian Wasson Complex
Purchased groundwater 0
0 violations
East Montgomery County Mud 5
Groundwater 0
0 violations
Century Gas Plant
Groundwater 0
0 violations
Montgomery County Mud 157
Groundwater 0
8 violations (5yr)
Contaminants Found
LEAD AND COPPER RULE REVISIONSHealth-Based
4 violations
All resolved
ArsenicHealth-Based
A naturally occurring element that can cause cancer and other health effects at high levels.
2 violations
All resolved
Interim Enhanced Surface Water Treatment RuleHealth-Based
1 violation
All resolved
TTHMHealth-Based
1 violation
All resolved
Public NoticeMonitoring
8 violations
Has active
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
4 violations
Has active
E. COLIMonitoring
2 violations
All resolved
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
2 violations
All resolved
BariumMonitoring
1 violation
All resolved
Antimony, TotalMonitoring
1 violation
All resolved
MercuryMonitoring
1 violation
All resolved
ChromiumMonitoring
1 violation
All resolved
SeleniumMonitoring
1 violation
All resolved
CadmiumMonitoring
1 violation
All resolved
Beryllium, TotalMonitoring
1 violation
All resolved
Thallium, TotalMonitoring
1 violation
All resolved
TetrachloroethyleneMonitoring
1 violation
All resolved
Xylenes, TotalMonitoring
1 violation
All resolved
cis-1,2-DichloroethyleneMonitoring
1 violation
All resolved
CHLOROBENZENEMonitoring
1 violation
All resolved
TolueneMonitoring
1 violation
All resolved
DICHLOROMETHANEMonitoring
1 violation
All resolved
TrichloroethyleneMonitoring
1 violation
All resolved
p-DichlorobenzeneMonitoring
1 violation
All resolved
o-DichlorobenzeneMonitoring
1 violation
All resolved
1,2-DichloroethaneMonitoring
1 violation
All resolved
EthylbenzeneMonitoring
1 violation
All resolved
BenzeneMonitoring
1 violation
All resolved
1,2,4-TrichlorobenzeneMonitoring
1 violation
All resolved
1,1-DichloroethyleneMonitoring
1 violation
All resolved
trans-1,2-DichloroethyleneMonitoring
1 violation
All resolved
1,1,1-TrichloroethaneMonitoring
1 violation
All resolved
1,1,2-TrichloroethaneMonitoring
1 violation
All resolved
Vinyl chlorideMonitoring
1 violation
All resolved
StyreneMonitoring
1 violation
All resolved
1,2-DichloropropaneMonitoring
1 violation
All resolved
Carbon tetrachlorideMonitoring
1 violation
All resolved
OXAMYLMonitoring
1 violation
All resolved
Aldicarb sulfoxideMonitoring
1 violation
All resolved
CarbofuranMonitoring
1 violation
All resolved
Aldicarb sulfoneMonitoring
1 violation
All resolved
AldicarbMonitoring
1 violation
All resolved
NitrateMonitoring
At high levels, nitrate can cause blue baby syndrome in infants.
1 violation
All resolved
Combined Radium (-226 and -228)Monitoring
1 violation
All resolved
Gross Alpha, Excl. Radon and UMonitoring
1 violation
All resolved
Combined UraniumMonitoring
1 violation
All resolved
CYANIDEMonitoring
1 violation
All resolved
2,4-DMonitoring
1 violation
All resolved
PicloramMonitoring
1 violation
All resolved
DalaponMonitoring
1 violation
All resolved
DinosebMonitoring
1 violation
All resolved
2,4,5-TPMonitoring
1 violation
All resolved
Lead & Copper Levels
Lead (Pb)
Within limit4.34 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
How Does This Compare?
Houston (77046) has more violations than 92% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 68.
Fewer violations 92th percentile More violations
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.