Monitoring Violations CA

Millview County Water District

Name: Water Quality Data for Millview County Water District
Creator: ZipCheckup
License: https://creativecommons.org/licenses/by/4.0/

EPA ID: CA2310006 · 5,500 people served · 4 ZIP codes

Federal compliance records for Millview County Water District list 3 open violations that have not yet been resolved — the utility serves approximately 5,500 people, and each outstanding finding remains logged and active in the EPA enforcement database.

Data: EPA SDWIS Last verified: 2026-04-02

B · 80

Avg Safety Score

5,500

People Served

ZIP Codes Served

Violations (5yr)

Surface Water

Water Source

0.022 mg/L

Max Lead Level — Exceeds Limit

Zone 3

Radon Risk · Low

Contaminants Flagged

$503K

Median Home Value in Service Area

Compliance Trajectory

Stable · Risk tier: High · 90% chance of violation in next 12 months

Violations went from 1 (2023) to 1 (2025). Violation counts have remained relatively steady.

Service Area Map

Coverage area for Millview County Water District Source: EPA SDWIS service area boundaries.

Service area boundary — Grade B

Service Area Demographics

$66,793

Median Household Income

55,441

Service Area Population

55%

Disadvantaged Population

70th

Poverty Percentile

70th

Energy Burden Percentile

64%

Pre-1986 Housing

The Millview County Water District serves a community with a median household income of $66,793 and an estimated 55,441 residents across its service area. Approximately 64% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.

Environmental Justice Note: 55% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.

🌊 Where Does Your Water Come From?

Surface Water

Millview County Water District's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.

Elevated Risk

Source Contamination Risk

30th

Wastewater Discharge Proximity

50th

Superfund Site Proximity

About 2% of homes in Mendocino County, California rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.

Infrastructure Risk

53 yr

Avg Pipe Age

Copper

Pipe Material

16 yr

Est. Remaining Life

Moderate Wear

Decay Status

Installed 77% of expected lifespan used End of life

Detected Contaminants

How Millview County Water District compares to EPA limits

Nitrate 1 mg/L (as nitrogen) (10% of limit)

0 EPA Limit: 10 mg/L (as nitrogen)

Blue baby syndrome in infants; potential cancer risk in adults

What This Means For You

Consumer Confidence Report Rule at 2 mg/L exceeds the EPA maximum of mg/L.

Stage 1 DBP Rule at 1 mg/L exceeds the EPA maximum of mg/L.

PFAS Detected in Service Area

PFAS ("forever chemicals") have been detected in water serving this system's area. 9 detections recorded. 2 exceed federal EPA limits (4 ppt for PFOA/PFOS). 2 exceed state limits.

State limits: PFOA: 0.0051 ppt, PFOS: 0.0065 ppt

Health concern: PFAS are linked to cancer, thyroid disease, immune suppression, and developmental effects. They do not break down naturally.

Recommended filter: Reverse osmosis (RO) or activated carbon filters certified for PFAS removal. Find the right filter →

Nitrate was detected in this water system. reverse osmosis filtration can reduce exposure.

Find a certified water filter →

Comparable Water Systems

Similar-sized systems in California

Maywood Mutual Water Company #1

5,500 people

0 violations

Hilmar County Water District

5,504 people

B 0 violations

Riverstone/rootcreek Water District

5,507 people

0 violations

Cambria Commission Services District

5,532 people

B 1 violation

Tud - Columbia Water System

5,463 people

B 1 violation

Estimated Remediation Costs

Average estimated costs across ZIP codes served by this system

Lead Pipe Replacement Flood Insurance PFAS Treatment Water Filtration

Lead Pipe Replacement $1,920

Flood Insurance $1,350

PFAS Treatment $150

Water Filtration $75

Total Estimated Cost $3,495

Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.

Cost of Inaction

If water quality issues in this service area are not addressed, the estimated financial impact per household is:

Estimated Healthcare Costs $500

Annual per household (CDC est.)

Lead Exposure — Child Lifetime Cost $10,000

Per affected child (EPA est.)

PFAS Exposure — Lifetime Cost $1,000

Per person (emerging research est.)

Estimated Cumulative Cost Per Household

5 years

$5,445

10 years

$10,890

20 years

$21,780

Compare: Estimated remediation cost is $3,495 (one-time) vs. $10,890 in estimated inaction costs over 10 years.

Estimates based on published EPA, CDC, and peer-reviewed research. Individual costs vary by household size, property, and health factors. These are conservative lower-bound estimates intended for awareness, not financial advice.

System Overview

Millview County Water District (EPA ID: CA2310006) is a community water system in California that serves approximately 5,500 people from surface water sources.

This system provides water to 4 ZIP codes across 4 communities.

Average Home Safety Score: B (80/100)

Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.

Violation History

4 monitoring/reporting violations recorded. These are procedural violations (missed tests or late reports), not necessarily water safety issues.

Contaminants Detected

The following contaminants have been flagged in EPA records for this water system:

Contaminant	Category	Violations	Health-Based
Consumer Confidence Report Rule	Reporting Failure	2	No
Nitrate	Inorganic	1	No
Stage 1 DBP Rule	Treatment Failure	1	No

Lead & Copper

EPA Lead and Copper Rule sampling data for ZIP codes served by this system:

ZIP Code	Lead Level	Exceeds Limit	Sample Date
95415	0.022 mg/L	Yes	N/A
95470	0.0034 mg/L	No	N/A

Lead exceeds EPA action level in at least one sampling location. Consider using a certified NSF/ANSI 53 or NSF/ANSI 58 filter rated for lead removal.

Radon Risk in Service Area

Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)

Need help with your water quality?

Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400

Find the Right Water Filter

Free tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.

ZIP Codes Served

Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by CA or modeled from parcel and building-footprint data.

95415 — Boonville
95470 — Redwood Valley
95482 — Ukiah
95490 — Willits

Data Sources

This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Millview County Water District (CA2310006) on EPA.gov.

Frequently Asked Questions

Is Millview County Water District water safe to drink?

Millview County Water District has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.

How many people does Millview County Water District serve?

Millview County Water District serves approximately 5,500 people across 4 ZIP codes in California.

Where does Millview County Water District get its water?

The primary water source is surface water.

Contact Your Water Utility

Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.

Phone

(707) 462-7229

ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.

Address

151 Laws Avenue, Ukiah, CA 95482

Contact information from Millview County Water District Consumer Confidence Report.

Water Source & Treatment

Where this water originates and how it's treated before reaching your tap.

Source

Blended (groundwater + surface water)

Combines water from both groundwater and surface sources.

Disinfectant used

Chlorine

Treatment chemicals reported

chlorinehypochlorite

Source: Millview County Water District Consumer Confidence Report.

ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.

Treatment regime

How this utility classifies its treatment process and what each reported treatment chemical does.

Treatment classification

Multi-stage

Multiple treatment stages — typically coagulation, filtration, and disinfection. Common for surface-water systems requiring removal of particulates, microorganisms, and dissolved organic compounds before disinfection.

Treatment chemicals and what each one does

Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.

Disinfectant

Inactivates bacteria, viruses, and parasites in the treated water.

chlorine

Other reported chemicals

Reported by the utility but not in our annotation dictionary.

hypochlorite

Watershed exposure sources reported

Land-use and natural conditions identified in the utility's source-water assessment as potential contamination sources upstream of treatment.

AgricultureIndustrial activitySeptic systemsUrban stormwater runoffMiningOil and gas production

Treatment classification and chemical list sourced from Millview County Water District Consumer Confidence Report.

Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.

Federal UCMR5 PFAS Monitoring: Tested Clean

This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.

Samples collected

232

Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.

Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →

Understand PFAS health context and filtration →

Lead Service Line Inventory

Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:

Confirmed Lead

Galvanized — Replacement Required

Unknown Material

1,676

Confirmed Non-Lead

This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.

Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.

Federal Regulatory Status · 2026Q1

LCRR inventory submission: Reported all required service line types

Latest tap sample on 2022-01-01 did not exceed the federal lead action level.

Population served: 5,500

Reported to California

Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026

ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.

Learn about lead in drinking water →

Aesthetic water quality

These measurements describe the look, taste, and feel of the water this utility delivers. They are not contaminant violations — they sit alongside federal Secondary Maximum Contaminant Levels (SMCLs) which the EPA publishes as non-enforceable guidance.

Fluoride

0 ppm

Utility does not add fluoride

Measured fluoride concentration in parts per million.

EPA secondary MCL: 2.0 ppm

Total dissolved solids

133.5 ppm

Mineral content remaining after evaporation, including calcium, magnesium, sodium, and other dissolved substances.

EPA secondary MCL: 500 ppm

Aesthetic measurements from Millview County Water District Consumer Confidence Report.

Aesthetic measurements are reported by the utility from its annual sampling. EPA Secondary MCLs are advisory thresholds — values outside them indicate aesthetic concerns such as taste or appearance, not health violations. Federal contaminant testing is shown in the sections above.

Notable events and violations

This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.

Federal compliance violations on record

These entries are taken verbatim from the utility's CCR violations section. EPA defines four broad violation categories: Maximum Contaminant Level (MCL), Treatment Technique (TT), Monitoring & Reporting (M&R), and Public Notification (PN).

MCL · Iron

Date not published

Iron levels exceeded the MCL of 300 ppb.
MCL · Manganese

Date not published

Manganese levels exceeded the MCL of 50 ppb.
MCL · Turbidity

Date not published

Turbidity levels exceeded the MCL of 5 NTU.

Violations record from Millview County Water District Consumer Confidence Report.

Notable events from the utility's CCR

These bullet entries are the utility's own narration of operational, regulatory, or infrastructure events during the reporting period.

Notable events from Millview County Water District Consumer Confidence Report:

Iron, Manganese, and Turbidity levels exceeded MCLs; these numbers are reflected in raw water prior to filtration and treatment.

ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.

Frequently Asked Questions

Is water from Millview County Water District safe to drink? ▼

Millview County Water District earns a B safety grade with 4 violations in the past 5 years. Tap water meets EPA standards for most contaminants.

What contaminants are in Millview County Water District's water? ▼

Detected contaminants include Consumer Confidence Report Rule, Stage 1 DBP Rule, Nitrate. Each is compared against EPA maximum contaminant levels (MCLs) in the detailed breakdown above.

Should I use a water filter? ▼

Given 2 contaminants above EPA limits, a certified water filter can provide an extra layer of protection. The best type depends on specific contaminants in your water.

How many people does Millview County Water District serve? ▼

Millview County Water District serves approximately 5,500 people with drinking water across 4 ZIP codes.

What is Millview County Water District's water source? ▼

Millview County Water District draws water from surface water sources. Source type affects which contaminants are most likely to be present.

Is there lead in Millview County Water District's water? ▼

The maximum detected lead level is 0.022 mg/L. This exceeds the EPA action level of 0.015 mg/L. A lead-certified filter is recommended, especially for homes with young children.

What is the demographic profile of Millview County Water District's service area? ▼

The Millview County Water District service area has a median household income of $66,793. EPA EJScreen data classifies 55% of the population as disadvantaged, which may indicate greater vulnerability to environmental health risks.

Where does Millview County Water District get its water? ▼

What You Can Do

Test your water

Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →

Check your specific ZIP code

Water quality can vary within a system. View nearest ZIP report →

Contact your utility

Millview County Water District (EPA ID: CA2310006) — request the latest Consumer Confidence Report or ask about specific contaminants.

Home › Water Systems › California › Millview County Water District