Water Quality in Castle Rock, CO (80116)

EPA violation data for public water systems serving ZIP code 80116.

Active Health Violations

2 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 98% of US ZIP codes.

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

5,132

Population

Water Systems

164

Violations (5yr)

Health-Based

Location

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Water Systems Serving This Area (10)

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) ✓

Castlewood Canyon State Park

All resolved

Groundwater 359 people served

2 violations (5yr) · All resolved

Leivers Express

Groundwater 231 people served

0 violations

Castlewood Community Preschool

2 health-based

Groundwater 125 people served

145 violations (5yr) · 2 health-based · All resolved

Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 1350 ppb (limit: 1300 ppb)

Resolved

Lead and Copper Rule Monitoring

Apr 2025 Resolved

Lead and Copper Rule Monitoring

Jan 2025 Resolved

Revised Total Coliform Rule Monitoring

Sep 2024 Resolved

Chlorine Monitoring

Jul 2024 Resolved

Lead and Copper Rule Monitoring

Jul 2024 Resolved

Public Notice Monitoring

Feb 2024 Resolved

Revised Total Coliform Rule Health

Jan 2024 Resolved

TTHM Monitoring

Jan 2024 Resolved

1,2-DIBROMO-3-CHLOROPROPANE Monitoring

Jan 2024 Resolved

ETHYLENE DIBROMIDE Monitoring

Jan 2024 Resolved

Toxaphene Monitoring

Jan 2024 Resolved

Total Polychlorinated Biphenyls (PCB) Monitoring

Jan 2024 Resolved

Chlordane Monitoring

Jan 2024 Resolved

Total Haloacetic Acids (HAA5) Monitoring

Jan 2024 Resolved

Lead and Copper Rule Monitoring

Oct 2023 Resolved

Stage 2 Disinfectants and Disinfection Byproducts Rule Monitoring

Jul 2023 Resolved

Revised Total Coliform Rule Monitoring

Jul 2023 Resolved

Arsenic Monitoring

Jul 2023 Resolved

Tetrachloroethylene Monitoring

Jul 2023 Resolved

Selenium Monitoring

Jul 2023 Resolved

Toluene Monitoring

Jul 2023 Resolved

Endrin Monitoring

Jul 2023 Resolved

Heptachlor epoxide Monitoring

Jul 2023 Resolved

1,2,4-Trichlorobenzene Monitoring

Jul 2023 Resolved

Dalapon Monitoring

Jul 2023 Resolved

Heptachlor Monitoring

Jul 2023 Resolved

Nickel Monitoring

Jul 2023 Resolved

1,2-DIBROMO-3-CHLOROPROPANE Monitoring

Jul 2023 Resolved

Benzo(a)pyrene Monitoring

Jul 2023 Resolved

2,4-D Monitoring

Jul 2023 Resolved

Picloram Monitoring

Jul 2023 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Jul 2023 Resolved

Ethylbenzene Monitoring

Jul 2023 Resolved

Dinoseb Monitoring

Jul 2023 Resolved

Diquat Monitoring

Jul 2023 Resolved

Chlordane Monitoring

Jul 2023 Resolved

1,2-Dichloroethane Monitoring

Jul 2023 Resolved

Cadmium Monitoring

Jul 2023 Resolved

Toxaphene Monitoring

Jul 2023 Resolved

LASSO Monitoring

Jul 2023 Resolved

DICHLOROMETHANE Monitoring

Jul 2023 Resolved

Di(2-ethylhexyl) adipate Monitoring

Jul 2023 Resolved

Carbon tetrachloride Monitoring

Jul 2023 Resolved

Vinyl chloride Monitoring

Jul 2023 Resolved

ETHYLENE DIBROMIDE Monitoring

Jul 2023 Resolved

p-Dichlorobenzene Monitoring

Jul 2023 Resolved

Mercury Monitoring

Jul 2023 Resolved

Beryllium, Total Monitoring

Jul 2023 Resolved

Antimony, Total Monitoring

Jul 2023 Resolved

Trichloroethylene Monitoring

Jul 2023 Resolved

Carbofuran Monitoring

Jul 2023 Resolved

Fluoride Monitoring

Jul 2023 Resolved

Benzene Monitoring

Jul 2023 Resolved

CHLOROBENZENE Monitoring

Jul 2023 Resolved

1,2-Dichloropropane Monitoring

Jul 2023 Resolved

Styrene Monitoring

Jul 2023 Resolved

HEXACHLOROBENZENE Monitoring

Jul 2023 Resolved

Thallium, Total Monitoring

Jul 2023 Resolved

Chromium Monitoring

Jul 2023 Resolved

1,1,2-Trichloroethane Monitoring

Jul 2023 Resolved

trans-1,2-Dichloroethylene Monitoring

Jul 2023 Resolved

BHC-GAMMA Monitoring

Jul 2023 Resolved

o-Dichlorobenzene Monitoring

Jul 2023 Resolved

cis-1,2-Dichloroethylene Monitoring

Jul 2023 Resolved

Total Polychlorinated Biphenyls (PCB) Monitoring

Jul 2023 Resolved

Atrazine Monitoring

Jul 2023 Resolved

Endothall Monitoring

Jul 2023 Resolved

Xylenes, Total Monitoring

Jul 2023 Resolved

OXAMYL Monitoring

Jul 2023 Resolved

Simazine Monitoring

Jul 2023 Resolved

1,1,1-Trichloroethane Monitoring

Jul 2023 Resolved

1,1-Dichloroethylene Monitoring

Jul 2023 Resolved

Barium Monitoring

Jul 2023 Resolved

Pentachlorophenol Monitoring

Jul 2023 Resolved

Hexachlorocyclopentadiene Monitoring

Jul 2023 Resolved

Methoxychlor Monitoring

Jul 2023 Resolved

2,4,5-TP Monitoring

Jul 2023 Resolved

Stage 1 Disinfectants and Disinfection Byproducts Rule Health

Jun 2023 Resolved

Revised Total Coliform Rule Monitoring

May 2023 Resolved

1,1,2-Trichloroethane Monitoring

Apr 2023 Resolved

Atrazine Monitoring

Apr 2023 Resolved

Toluene Monitoring

Apr 2023 Resolved

LASSO Monitoring

Apr 2023 Resolved

Beryllium, Total Monitoring

Apr 2023 Resolved

OXAMYL Monitoring

Apr 2023 Resolved

Tetrachloroethylene Monitoring

Apr 2023 Resolved

Nickel Monitoring

Apr 2023 Resolved

Diquat Monitoring

Apr 2023 Resolved

Vinyl chloride Monitoring

Apr 2023 Resolved

1,1-Dichloroethylene Monitoring

Apr 2023 Resolved

Picloram Monitoring

Apr 2023 Resolved

Chlordane Monitoring

Apr 2023 Resolved

Styrene Monitoring

Apr 2023 Resolved

2,4,5-TP Monitoring

Apr 2023 Resolved

Ethylbenzene Monitoring

Apr 2023 Resolved

Heptachlor Monitoring

Apr 2023 Resolved

Hexachlorocyclopentadiene Monitoring

Apr 2023 Resolved

Selenium Monitoring

Apr 2023 Resolved

1,2-Dichloropropane Monitoring

Apr 2023 Resolved

Chlorine Monitoring

Apr 2023 Resolved

Thallium, Total Monitoring

Apr 2023 Resolved

Total Polychlorinated Biphenyls (PCB) Monitoring

Apr 2023 Resolved

1,1,1-Trichloroethane Monitoring

Apr 2023 Resolved

Arsenic Monitoring

Apr 2023 Resolved

2,4-D Monitoring

Apr 2023 Resolved

Mercury Monitoring

Apr 2023 Resolved

cis-1,2-Dichloroethylene Monitoring

Apr 2023 Resolved

1,2-DIBROMO-3-CHLOROPROPANE Monitoring

Apr 2023 Resolved

ETHYLENE DIBROMIDE Monitoring

Apr 2023 Resolved

Simazine Monitoring

Apr 2023 Resolved

Antimony, Total Monitoring

Apr 2023 Resolved

Benzo(a)pyrene Monitoring

Apr 2023 Resolved

Cadmium Monitoring

Apr 2023 Resolved

o-Dichlorobenzene Monitoring

Apr 2023 Resolved

Carbofuran Monitoring

Apr 2023 Resolved

Benzene Monitoring

Apr 2023 Resolved

BHC-GAMMA Monitoring

Apr 2023 Resolved

Di(2-ethylhexyl) phthalate Monitoring

Apr 2023 Resolved

Fluoride Monitoring

Apr 2023 Resolved

Methoxychlor Monitoring

Apr 2023 Resolved

Carbon tetrachloride Monitoring

Apr 2023 Resolved

Heptachlor epoxide Monitoring

Apr 2023 Resolved

Nitrate Monitoring

Apr 2023 Resolved

Endothall Monitoring

Apr 2023 Resolved

Trichloroethylene Monitoring

Apr 2023 Resolved

CHLOROBENZENE Monitoring

Apr 2023 Resolved

trans-1,2-Dichloroethylene Monitoring

Apr 2023 Resolved

DICHLOROMETHANE Monitoring

Apr 2023 Resolved

Barium Monitoring

Apr 2023 Resolved

Endrin Monitoring

Apr 2023 Resolved

Toxaphene Monitoring

Apr 2023 Resolved

HEXACHLOROBENZENE Monitoring

Apr 2023 Resolved

Xylenes, Total Monitoring

Apr 2023 Resolved

Revised Total Coliform Rule Monitoring

Apr 2023 Resolved

Dinoseb Monitoring

Apr 2023 Resolved

1,2-Dichloroethane Monitoring

Apr 2023 Resolved

p-Dichlorobenzene Monitoring

Apr 2023 Resolved

Di(2-ethylhexyl) adipate Monitoring

Apr 2023 Resolved

1,2,4-Trichlorobenzene Monitoring

Apr 2023 Resolved

Chromium Monitoring

Apr 2023 Resolved

Dalapon Monitoring

Apr 2023 Resolved

Pentachlorophenol Monitoring

Apr 2023 Resolved

Lead and Copper Rule Monitoring

Jan 2023 Resolved

Total Haloacetic Acids (HAA5) Monitoring

Jan 2023 Resolved

TTHM Monitoring

Jan 2023 Resolved

Christlife Community Church

Groundwater 100 people served

0 violations

Adrianas Mexican Restaurant

Groundwater 66 people served

0 violations

Masons Trailer Park

Groundwater 23 people served

0 violations

Contaminants Found

Revised Total Coliform RuleHealth-Based

Missed testing deadlines — not a detection of bacteria.

6 violations

All resolved

Stage 1 Disinfectants and Disinfection Byproducts RuleHealth-Based

1 violation

All resolved

Lead and Copper RuleMonitoring

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

6 violations

All resolved

Surface Water Treatment RuleMonitoring

4 violations

All resolved

1,2-DIBROMO-3-CHLOROPROPANEMonitoring

3 violations

All resolved

ETHYLENE DIBROMIDEMonitoring

3 violations

All resolved

ToxapheneMonitoring

3 violations

All resolved

Total Polychlorinated Biphenyls (PCB)Monitoring

3 violations

All resolved

ChlordaneMonitoring

3 violations

All resolved

NitrateMonitoring

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

2 violations

All resolved

ChlorineMonitoring

Used to disinfect water — generally safe at regulated levels.

2 violations

All resolved

TTHMMonitoring

2 violations

All resolved

Total Haloacetic Acids (HAA5)Monitoring

2 violations

All resolved

ArsenicMonitoring

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

2 violations

All resolved

TetrachloroethyleneMonitoring

2 violations

All resolved

SeleniumMonitoring

2 violations

All resolved

TolueneMonitoring

2 violations

All resolved

EndrinMonitoring

2 violations

All resolved

Heptachlor epoxideMonitoring

2 violations

All resolved

1,2,4-TrichlorobenzeneMonitoring

2 violations

All resolved

DalaponMonitoring

2 violations

All resolved

HeptachlorMonitoring

2 violations

All resolved

NickelMonitoring

2 violations

All resolved

Benzo(a)pyreneMonitoring

2 violations

All resolved

2,4-DMonitoring

2 violations

All resolved

PicloramMonitoring

2 violations

All resolved

Di(2-ethylhexyl) phthalateMonitoring

2 violations

All resolved

EthylbenzeneMonitoring

2 violations

All resolved

DinosebMonitoring

2 violations

All resolved

DiquatMonitoring

2 violations

All resolved

1,2-DichloroethaneMonitoring

2 violations

All resolved

CadmiumMonitoring

2 violations

All resolved

LASSOMonitoring

2 violations

All resolved

DICHLOROMETHANEMonitoring

2 violations

All resolved

Di(2-ethylhexyl) adipateMonitoring

2 violations

All resolved

Carbon tetrachlorideMonitoring

2 violations

All resolved

Vinyl chlorideMonitoring

2 violations

All resolved

p-DichlorobenzeneMonitoring

2 violations

All resolved

MercuryMonitoring

2 violations

All resolved

Beryllium, TotalMonitoring

2 violations

All resolved

Antimony, TotalMonitoring

2 violations

All resolved

TrichloroethyleneMonitoring

2 violations

All resolved

CarbofuranMonitoring

2 violations

All resolved

FluorideMonitoring

2 violations

All resolved

BenzeneMonitoring

2 violations

All resolved

CHLOROBENZENEMonitoring

2 violations

All resolved

1,2-DichloropropaneMonitoring

2 violations

All resolved

StyreneMonitoring

2 violations

All resolved

HEXACHLOROBENZENEMonitoring

2 violations

All resolved

Thallium, TotalMonitoring

2 violations

All resolved

ChromiumMonitoring

2 violations

All resolved

1,1,2-TrichloroethaneMonitoring

2 violations

All resolved

trans-1,2-DichloroethyleneMonitoring

2 violations

All resolved

BHC-GAMMAMonitoring

2 violations

All resolved

o-DichlorobenzeneMonitoring

2 violations

All resolved

cis-1,2-DichloroethyleneMonitoring

2 violations

All resolved

AtrazineMonitoring

2 violations

All resolved

EndothallMonitoring

2 violations

All resolved

Xylenes, TotalMonitoring

2 violations

All resolved

OXAMYLMonitoring

2 violations

All resolved

SimazineMonitoring

2 violations

All resolved

1,1,1-TrichloroethaneMonitoring

2 violations

All resolved

1,1-DichloroethyleneMonitoring

2 violations

All resolved

BariumMonitoring

2 violations

All resolved

PentachlorophenolMonitoring

2 violations

All resolved

HexachlorocyclopentadieneMonitoring

2 violations

All resolved

MethoxychlorMonitoring

2 violations

All resolved

2,4,5-TPMonitoring

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

ChloriteMonitoring

1 violation

All resolved

Chlorine dioxideMonitoring

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

Public NoticeMonitoring

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

1350 ppb measured Action level: 1300 ppb

Sampled: Jan 2025

How Does This Compare?

Castle Rock (80116) has more violations than 98% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 164.

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.

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

NSF Certified Products → EPA Safe Drinking Water Guide →

UV Water Purifier

Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.

Targets:E. coli, Coliform, Giardia, Cryptosporidium

Look for:NSF/ANSI 55 (Class A) 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 (80116)

Active Health Violations

Location

Water Systems Serving This Area (10)

Castle Rock Town Of

Highlands Ranch Wsd

Parker Wsd

Meridian Md

Castlewood Canyon State Park

Leivers Express

Castlewood Community Preschool

Christlife Community Church

Adrianas Mexican Restaurant

Masons Trailer Park

Contaminants Found

Lead & Copper Levels

Lead (Pb)

Copper (Cu)

How Does This Compare?

Recommended Water Filters

Activated Carbon Filter

UV Water Purifier

Nearby ZIP Codes

Check Another ZIP Code