Water Quality in Castle Rock, CO (80134)

EPA violation data for public water systems serving ZIP code 80134.

Active Health Violations

1 health-based violation 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 98% of US ZIP codes.

Based on EPA compliance data. Not a substitute for an official water quality report from your utility.

80,302

Population

Water Systems

220

Violations (5yr)

Health-Based

Location

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Water Systems Serving This Area (23)

Castle Rock Town Of

All resolved

Surface water 106,822 people served

8 violations (5yr) · All resolved

Lead tested: 2 ppb (limit: 15 ppb) ✓

Highlands Ranch Wsd

Surface water 103,444 people served

0 violations

Lead tested: 2 ppb (limit: 15 ppb) ✓

Parker Wsd

Surface water 75,949 people served

7 violations (5yr)

Lead tested: 2 ppb (limit: 15 ppb) ✓

Meridian Md

All resolved

Purchased surface water 23,415 people served

2 violations (5yr) · All resolved

Lead tested: 0 ppb (limit: 15 ppb) ✓

Stonegate Md

Purchased surface water 15,295 people served

0 violations

Lead tested: 3 ppb (limit: 15 ppb) ✓

Pinery Wwd

All resolved

Purchased surface water 12,901 people served

2 violations (5yr) · All resolved

Lead tested: 0.9 ppb (limit: 15 ppb) ✓

Encompass Preschool

1 health-based

Groundwater 364 people served

132 violations (5yr) · 1 health-based · All resolved

Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 2010 ppb (limit: 1300 ppb)

Resolved

Lead and Copper Rule Monitoring

Jul 2025 Resolved

Lead and Copper Rule Monitoring

Jul 2024 Resolved

Public Notice Monitoring

Nov 2023 Resolved

Public Notice Monitoring

Aug 2023 Resolved

LASSO Monitoring

Jul 2023 Resolved

Thallium, Total Monitoring

Jul 2023 Resolved

Tetrachloroethylene Monitoring

Jul 2023 Resolved

cis-1,2-Dichloroethylene Monitoring

Jul 2023 Resolved

Cadmium Monitoring

Jul 2023 Resolved

Picloram Monitoring

Jul 2023 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Jul 2023 Resolved

Toxaphene Monitoring

Jul 2023 Resolved

1,1,2-Trichloroethane Monitoring

Jul 2023 Resolved

Lead and Copper Rule Monitoring

Jul 2023 Resolved

Chromium Monitoring

Jul 2023 Resolved

Total Polychlorinated Biphenyls (PCB) Monitoring

Jul 2023 Resolved

Ethylbenzene Monitoring

Jul 2023 Resolved

1,2-DIBROMO-3-CHLOROPROPANE Monitoring

Jul 2023 Resolved

2,4-D Monitoring

Jul 2023 Resolved

Benzo(a)pyrene Monitoring

Jul 2023 Resolved

Benzene Monitoring

Jul 2023 Resolved

Carbofuran Monitoring

Jul 2023 Resolved

Fluoride Monitoring

Jul 2023 Resolved

Barium Monitoring

Jul 2023 Resolved

HEXACHLOROBENZENE Monitoring

Jul 2023 Resolved

trans-1,2-Dichloroethylene Monitoring

Jul 2023 Resolved

Diquat Monitoring

Jul 2023 Resolved

Chlordane Monitoring

Jul 2023 Resolved

Dinoseb Monitoring

Jul 2023 Resolved

Heptachlor epoxide Monitoring

Jul 2023 Resolved

Selenium Monitoring

Jul 2023 Resolved

Toluene Monitoring

Jul 2023 Resolved

Endrin Monitoring

Jul 2023 Resolved

p-Dichlorobenzene Monitoring

Jul 2023 Resolved

Mercury Monitoring

Jul 2023 Resolved

Atrazine Monitoring

Jul 2023 Resolved

Beryllium, Total Monitoring

Jul 2023 Resolved

BHC-GAMMA Monitoring

Jul 2023 Resolved

Pentachlorophenol Monitoring

Jul 2023 Resolved

1,2-Dichloropropane Monitoring

Jul 2023 Resolved

Carbon tetrachloride Monitoring

Jul 2023 Resolved

Di(2-ethylhexyl) adipate Monitoring

Jul 2023 Resolved

DICHLOROMETHANE Monitoring

Jul 2023 Resolved

Dalapon Monitoring

Jul 2023 Resolved

Nickel Monitoring

Jul 2023 Resolved

o-Dichlorobenzene Monitoring

Jul 2023 Resolved

Arsenic Monitoring

Jul 2023 Resolved

Hexachlorocyclopentadiene Monitoring

Jul 2023 Resolved

Styrene Monitoring

Jul 2023 Resolved

Methoxychlor Monitoring

Jul 2023 Resolved

1,2-Dichloroethane Monitoring

Jul 2023 Resolved

Heptachlor Monitoring

Jul 2023 Resolved

CHLOROBENZENE Monitoring

Jul 2023 Resolved

2,4,5-TP Monitoring

Jul 2023 Resolved

ETHYLENE DIBROMIDE Monitoring

Jul 2023 Resolved

Nitrate Monitoring

Jul 2023 Resolved

OXAMYL Monitoring

Jul 2023 Resolved

Vinyl chloride Monitoring

Jul 2023 Resolved

Trichloroethylene Monitoring

Jul 2023 Resolved

Antimony, Total Monitoring

Jul 2023 Resolved

Simazine Monitoring

Jul 2023 Resolved

Endothall Monitoring

Jul 2023 Resolved

1,1,1-Trichloroethane Monitoring

Jul 2023 Resolved

1,1-Dichloroethylene Monitoring

Jul 2023 Resolved

Xylenes, Total Monitoring

Jul 2023 Resolved

1,2,4-Trichlorobenzene Monitoring

Jul 2023 Resolved

Lead and Copper Rule Health

Jul 2023 Resolved

Nickel Monitoring

Jan 2023 Resolved

Hexachlorocyclopentadiene Monitoring

Jan 2023 Resolved

p-Dichlorobenzene Monitoring

Jan 2023 Resolved

OXAMYL Monitoring

Jan 2023 Resolved

1,1,2-Trichloroethane Monitoring

Jan 2023 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Jan 2023 Resolved

Carbon tetrachloride Monitoring

Jan 2023 Resolved

Antimony, Total Monitoring

Jan 2023 Resolved

1,2-Dichloropropane Monitoring

Jan 2023 Resolved

HEXACHLOROBENZENE Monitoring

Jan 2023 Resolved

Carbofuran Monitoring

Jan 2023 Resolved

LASSO Monitoring

Jan 2023 Resolved

1,2-DIBROMO-3-CHLOROPROPANE Monitoring

Jan 2023 Resolved

Endothall Monitoring

Jan 2023 Resolved

Selenium Monitoring

Jan 2023 Resolved

Styrene Monitoring

Jan 2023 Resolved

Dalapon Monitoring

Jan 2023 Resolved

Thallium, Total Monitoring

Jan 2023 Resolved

Tetrachloroethylene Monitoring

Jan 2023 Resolved

Mercury Monitoring

Jan 2023 Resolved

ETHYLENE DIBROMIDE Monitoring

Jan 2023 Resolved

Fluoride Monitoring

Jan 2023 Resolved

Nitrate Monitoring

Jan 2023 Resolved

Toxaphene Monitoring

Jan 2023 Resolved

Simazine Monitoring

Jan 2023 Resolved

Methoxychlor Monitoring

Jan 2023 Resolved

2,4-D Monitoring

Jan 2023 Resolved

Trichloroethylene Monitoring

Jan 2023 Resolved

Dinoseb Monitoring

Jan 2023 Resolved

Benzo(a)pyrene Monitoring

Jan 2023 Resolved

Picloram Monitoring

Jan 2023 Resolved

Vinyl chloride Monitoring

Jan 2023 Resolved

Di(2-ethylhexyl) adipate Monitoring

Jan 2023 Resolved

Xylenes, Total Monitoring

Jan 2023 Resolved

Heptachlor Monitoring

Jan 2023 Resolved

1,2-Dichloroethane Monitoring

Jan 2023 Resolved

cis-1,2-Dichloroethylene Monitoring

Jan 2023 Resolved

Heptachlor epoxide Monitoring

Jan 2023 Resolved

Cadmium Monitoring

Jan 2023 Resolved

Barium Monitoring

Jan 2023 Resolved

Arsenic Monitoring

Jan 2023 Resolved

o-Dichlorobenzene Monitoring

Jan 2023 Resolved

BHC-GAMMA Monitoring

Jan 2023 Resolved

Ethylbenzene Monitoring

Jan 2023 Resolved

1,1-Dichloroethylene Monitoring

Jan 2023 Resolved

Total Polychlorinated Biphenyls (PCB) Monitoring

Jan 2023 Resolved

trans-1,2-Dichloroethylene Monitoring

Jan 2023 Resolved

1,2,4-Trichlorobenzene Monitoring

Jan 2023 Resolved

Atrazine Monitoring

Jan 2023 Resolved

Endrin Monitoring

Jan 2023 Resolved

DICHLOROMETHANE Monitoring

Jan 2023 Resolved

Chlordane Monitoring

Jan 2023 Resolved

Chromium Monitoring

Jan 2023 Resolved

2,4,5-TP Monitoring

Jan 2023 Resolved

Toluene Monitoring

Jan 2023 Resolved

Pentachlorophenol Monitoring

Jan 2023 Resolved

CHLOROBENZENE Monitoring

Jan 2023 Resolved

Benzene Monitoring

Jan 2023 Resolved

1,1,1-Trichloroethane Monitoring

Jan 2023 Resolved

Diquat Monitoring

Jan 2023 Resolved

Beryllium, Total Monitoring

Jan 2023 Resolved

Lead and Copper Rule Monitoring

Jul 2022 Resolved

TTHM Monitoring

Jan 2022 Resolved

Total Haloacetic Acids (HAA5) Monitoring

Jan 2022 Resolved

Parker Heights Wtr & San Dist

Groundwater 250 people served

0 violations

East Valley Md

All resolved

Groundwater 230 people served

3 violations (5yr) · All resolved

Lead tested: 2.3 ppb (limit: 15 ppb) ✓

Parker Metro Dist

Groundwater 200 people served

0 violations

Buffalo Boyd'S Rest/Saloon

Groundwater 200 people served

0 violations

Sky Vu Drive In

Groundwater 100 people served

0 violations

United Church Of Christ Parker Hilltop

All resolved

Groundwater 95 people served

66 violations (5yr) · All resolved

Lead tested: 7 ppb (limit: 15 ppb) ✓

Resolved

Revised Total Coliform Rule Monitoring

Apr 2024 Resolved

Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring

Apr 2024 Resolved

1,1-Dichloroethylene Monitoring

Apr 2024 Resolved

Styrene Monitoring

Apr 2024 Resolved

p-Dichlorobenzene Monitoring

Apr 2024 Resolved

Chromium Monitoring

Apr 2024 Resolved

Vinyl chloride Monitoring

Apr 2024 Resolved

DICHLOROMETHANE Monitoring

Apr 2024 Resolved

Barium Monitoring

Apr 2024 Resolved

Hexachlorocyclopentadiene Monitoring

Apr 2024 Resolved

Arsenic Monitoring

Apr 2024 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Apr 2024 Resolved

1,2-Dichloropropane Monitoring

Apr 2024 Resolved

Toluene Monitoring

Apr 2024 Resolved

Carbofuran Monitoring

Apr 2024 Resolved

HEXACHLOROBENZENE Monitoring

Apr 2024 Resolved

Xylenes, Total Monitoring

Apr 2024 Resolved

Diquat Monitoring

Apr 2024 Resolved

Benzene Monitoring

Apr 2024 Resolved

Cadmium Monitoring

Apr 2024 Resolved

Mercury Monitoring

Apr 2024 Resolved

o-Dichlorobenzene Monitoring

Apr 2024 Resolved

1,1,2-Trichloroethane Monitoring

Apr 2024 Resolved

2,4,5-TP Monitoring

Apr 2024 Resolved

1,1,1-Trichloroethane Monitoring

Apr 2024 Resolved

Chlordane Monitoring

Apr 2024 Resolved

Selenium Monitoring

Apr 2024 Resolved

LASSO Monitoring

Apr 2024 Resolved

Nickel Monitoring

Apr 2024 Resolved

CHLOROBENZENE Monitoring

Apr 2024 Resolved

Dinoseb Monitoring

Apr 2024 Resolved

Heptachlor Monitoring

Apr 2024 Resolved

Tetrachloroethylene Monitoring

Apr 2024 Resolved

Thallium, Total Monitoring

Apr 2024 Resolved

Pentachlorophenol Monitoring

Apr 2024 Resolved

Antimony, Total Monitoring

Apr 2024 Resolved

Di(2-ethylhexyl) adipate Monitoring

Apr 2024 Resolved

1,2,4-Trichlorobenzene Monitoring

Apr 2024 Resolved

2,4-D Monitoring

Apr 2024 Resolved

1,2-Dichloroethane Monitoring

Apr 2024 Resolved

Heptachlor epoxide Monitoring

Apr 2024 Resolved

cis-1,2-Dichloroethylene Monitoring

Apr 2024 Resolved

Trichloroethylene Monitoring

Apr 2024 Resolved

Beryllium, Total Monitoring

Apr 2024 Resolved

Carbon tetrachloride Monitoring

Apr 2024 Resolved

Nitrate Monitoring

Apr 2024 Resolved

trans-1,2-Dichloroethylene Monitoring

Apr 2024 Resolved

Fluoride Monitoring

Apr 2024 Resolved

Atrazine Monitoring

Apr 2024 Resolved

Endrin Monitoring

Apr 2024 Resolved

Benzo(a)pyrene Monitoring

Apr 2024 Resolved

1,2-DIBROMO-3-CHLOROPROPANE Monitoring

Apr 2024 Resolved

Total Polychlorinated Biphenyls (PCB) Monitoring

Apr 2024 Resolved

Toxaphene Monitoring

Apr 2024 Resolved

ETHYLENE DIBROMIDE Monitoring

Apr 2024 Resolved

Ethylbenzene Monitoring

Apr 2024 Resolved

Simazine Monitoring

Apr 2024 Resolved

Picloram Monitoring

Apr 2024 Resolved

Dalapon Monitoring

Apr 2024 Resolved

BHC-GAMMA Monitoring

Apr 2024 Resolved

Methoxychlor Monitoring

Apr 2024 Resolved

Endothall Monitoring

Apr 2024 Resolved

OXAMYL Monitoring

Apr 2024 Resolved

Revised Total Coliform Rule Monitoring

Feb 2024 Resolved

Chlorine Monitoring

Jan 2024 Resolved

Revised Total Coliform Rule Monitoring

Jan 2024 Resolved

Colorado Rifle Club

Groundwater 50 people served

0 violations

Parker Village Pre-School

Groundwater 26 people served

0 violations

El Valle Restaurant

Groundwater 26 people served

0 violations

Roadhouse Inc

Groundwater 26 people served

0 violations

Richlawn Hills

Groundwater 26 people served

0 violations

Arkansas Valley Corr.Facility

Purchased groundwater 25 people served

0 violations

Stroh Ranch Parker Wsd

Groundwater 0

0 violations

Joy Lutheran Church Day Care

Groundwater 0

0 violations

Parker United Methodist Church

Groundwater 0

0 violations

Parker Vlg Preschool

Groundwater 0

0 violations

Contaminants Found

Lead and Copper RuleHealth-Based

Lead and copper testing requirement. Lead exposure can cause developmental harm in children.

6 violations

All resolved

Revised Total Coliform RuleMonitoring

Missed testing deadlines — not a detection of bacteria.

5 violations

All resolved

Surface Water Treatment RuleMonitoring

4 violations

All resolved

LASSOMonitoring

3 violations

All resolved

Thallium, TotalMonitoring

3 violations

All resolved

TetrachloroethyleneMonitoring

3 violations

All resolved

cis-1,2-DichloroethyleneMonitoring

3 violations

All resolved

CadmiumMonitoring

3 violations

All resolved

PicloramMonitoring

3 violations

All resolved

Di(2-ethylhexyl) phthalateMonitoring

3 violations

All resolved

ToxapheneMonitoring

3 violations

All resolved

1,1,2-TrichloroethaneMonitoring

3 violations

All resolved

ChromiumMonitoring

3 violations

All resolved

Total Polychlorinated Biphenyls (PCB)Monitoring

3 violations

All resolved

EthylbenzeneMonitoring

3 violations

All resolved

1,2-DIBROMO-3-CHLOROPROPANEMonitoring

3 violations

All resolved

2,4-DMonitoring

3 violations

All resolved

Benzo(a)pyreneMonitoring

3 violations

All resolved

BenzeneMonitoring

3 violations

All resolved

CarbofuranMonitoring

3 violations

All resolved

FluorideMonitoring

3 violations

All resolved

BariumMonitoring

3 violations

All resolved

HEXACHLOROBENZENEMonitoring

3 violations

All resolved

trans-1,2-DichloroethyleneMonitoring

3 violations

All resolved

DiquatMonitoring

3 violations

All resolved

ChlordaneMonitoring

3 violations

All resolved

DinosebMonitoring

3 violations

All resolved

Heptachlor epoxideMonitoring

3 violations

All resolved

SeleniumMonitoring

3 violations

All resolved

TolueneMonitoring

3 violations

All resolved

EndrinMonitoring

3 violations

All resolved

p-DichlorobenzeneMonitoring

3 violations

All resolved

MercuryMonitoring

3 violations

All resolved

AtrazineMonitoring

3 violations

All resolved

Beryllium, TotalMonitoring

3 violations

All resolved

BHC-GAMMAMonitoring

3 violations

All resolved

PentachlorophenolMonitoring

3 violations

All resolved

1,2-DichloropropaneMonitoring

3 violations

All resolved

Carbon tetrachlorideMonitoring

3 violations

All resolved

Di(2-ethylhexyl) adipateMonitoring

3 violations

All resolved

DICHLOROMETHANEMonitoring

3 violations

All resolved

DalaponMonitoring

3 violations

All resolved

NickelMonitoring

3 violations

All resolved

o-DichlorobenzeneMonitoring

3 violations

All resolved

ArsenicMonitoring

A naturally occurring element that can cause cancer and other health effects at high levels.

3 violations

All resolved

HexachlorocyclopentadieneMonitoring

3 violations

All resolved

StyreneMonitoring

3 violations

All resolved

MethoxychlorMonitoring

3 violations

All resolved

1,2-DichloroethaneMonitoring

3 violations

All resolved

HeptachlorMonitoring

3 violations

All resolved

CHLOROBENZENEMonitoring

3 violations

All resolved

2,4,5-TPMonitoring

3 violations

All resolved

ETHYLENE DIBROMIDEMonitoring

3 violations

All resolved

NitrateMonitoring

At high levels, nitrate can cause blue baby syndrome in infants.

3 violations

All resolved

OXAMYLMonitoring

3 violations

All resolved

Vinyl chlorideMonitoring

3 violations

All resolved

TrichloroethyleneMonitoring

3 violations

All resolved

Antimony, TotalMonitoring

3 violations

All resolved

SimazineMonitoring

3 violations

All resolved

EndothallMonitoring

3 violations

All resolved

1,1,1-TrichloroethaneMonitoring

3 violations

All resolved

1,1-DichloroethyleneMonitoring

3 violations

All resolved

Xylenes, TotalMonitoring

3 violations

All resolved

1,2,4-TrichlorobenzeneMonitoring

3 violations

All resolved

Total Haloacetic Acids (HAA5)Monitoring

2 violations

All resolved

TTHMMonitoring

2 violations

All resolved

Public NoticeMonitoring

2 violations

All resolved

ChlorineMonitoring

Used to disinfect water — generally safe at regulated levels.

2 violations

All resolved

Combined UraniumMonitoring

1 violation

All resolved

Gross Alpha, Excl. Radon and UMonitoring

1 violation

All resolved

Combined Radium (-226 and -228)Monitoring

1 violation

All resolved

LEAD AND COPPER RULE REVISIONSMonitoring

1 violation

Has active

Chlorine dioxideMonitoring

1 violation

All resolved

ChloriteMonitoring

1 violation

All resolved

E. COLIMonitoring

1 violation

All resolved

Consumer Confidence RuleMonitoring

Annual water quality report delivery requirement.

1 violation

All resolved

ChloramineMonitoring

1 violation

All resolved

Stage 2 Disinfectants and Disinfection Byproducts RuleMonitoring

Monitoring for chemicals formed during water treatment disinfection.

1 violation

All resolved

Lead & Copper Levels

Lead (Pb)

Within limit

2 ppb measured Action level: 15 ppb

Sampled: Jul 2025

Copper (Cu)

Exceeds limit

2010 ppb measured Action level: 1300 ppb

Sampled: Jul 2024

How Does This Compare?

Castle Rock (80134) has more violations than 98% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 220.

Fewer violations 98th 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

NSF Certified Products → EPA Safe Drinking Water Guide →

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.

Water Quality in Castle Rock, CO (80134)

Active Health Violations

Location

Water Systems Serving This Area (23)

Castle Rock Town Of

Highlands Ranch Wsd

Parker Wsd

Meridian Md

Stonegate Md

Pinery Wwd

Encompass Preschool

Parker Heights Wtr & San Dist

East Valley Md

Parker Metro Dist

Buffalo Boyd'S Rest/Saloon

Sky Vu Drive In

United Church Of Christ Parker Hilltop

Colorado Rifle Club

Parker Village Pre-School

El Valle Restaurant

Roadhouse Inc

Richlawn Hills

Arkansas Valley Corr.Facility

Stroh Ranch Parker Wsd

Joy Lutheran Church Day Care

Parker United Methodist Church

Parker Vlg Preschool

Contaminants Found

Lead & Copper Levels

Lead (Pb)

Copper (Cu)

How Does This Compare?

Recommended Water Filters

Reverse Osmosis System

Nearby ZIP Codes

Check Another ZIP Code