Autotrol Chromium-6 Filter

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Oxidation State and Chromium-6 from Source to Tap

Hexavalent chromium can change form during water treatment and delivery

Chromium-6, or hexavalent chromium, is a specific chemical state of chromium that can shift to other oxidation states as water moves from the surface water sources through treatment plants to household taps. This process depends on factors like disinfection and naturally occurring chemical reactions in the distribution mains. The Pasco County Utilities District - West relies on surface water sources, where chromium exists in varying oxidation states influenced by these transformations before it reaches consumers.

Chromium-6 concentrations in distribution are influenced by water chemistry

The interaction of chromium-6 with other elements and chemical conditions in the distribution system can alter its concentration at the tap. These changes are complex and depend on how treatment processes manage oxidants and how water chemistry evolves en route to homes in New Port Richey.

Geogenic Versus Industrial Sources of Hexavalent Chromium

Natural chromium-6 typically differs from industrial plating origins

Hexavalent chromium may originate from natural geologic sources or human activities. In arid and alkaline aquifers, chromium-6 can form through natural geochemical processes, while industrial sources, such as plating facilities, release chromium-6 from manufactured waste. Pasco County’s surface water source is more likely influenced by natural background levels and regional environmental factors rather than industrial chromium-6 releases.

Surface water presence reflects broader environmental inputs

The chromium-6 detected in Pasco County’s water system represents overall environmental presence in surface waters supplying the region. It does not reflect any one home's tap water condition but a generalized measurement for the public water system.

Understanding the UCMR3 Monitoring Purpose and Limitations

UCMR3 results provide occurrence data, not compliance or household tests

The EPA’s Unregulated Contaminant Monitoring Rule 3 (UCMR3) collected data from 2013 to 2015 to understand the presence of chromium-6 and other contaminants in public water systems. For Pasco County Utilities District - West, 26 out of 40 samples detected chromium-6 above 0.03 micrograms per liter (µg/L), with the highest recorded at 0.668 µg/L. These detections are measurements used for research and regulatory consideration but are not health-based violations or limits.

Household water quality requires individual testing

Since the EPA data applies to the entire system, only a specific test of an individual household’s water can determine its chromium-6 level. The system’s monitoring results do not estimate any particular home’s concentration.

Seasonal and Multi-Year Variation in Chromium-6 Levels

The available data covers February to September 2013

Monitoring occurred from February 18 to September 3, 2013, capturing early spring to late summer conditions for Pasco County’s water system. This period provides a snapshot rather than a continuous trend.

Chromium-6 occurrence may fluctuate over time

Environmental factors such as rainfall, source water changes, and treatment adjustments can affect chromium-6 levels. Without ongoing monitoring, it is unclear how concentrations vary across seasons or years beyond the UCMR3 timeframe.

Considerations for Different Household Water Use Patterns

Large households may experience different water dynamics

A household with higher water consumption in New Port Richey may experience different water change rates, potentially influencing exposure to chromium-6, but only a direct test can clarify any variations.

Seasonal or secondary homes’ water quality might differ

Properties used seasonally or as second homes in Pasco County could see different water exposure patterns due to usage irregularities, possibly affecting water quality characteristics at the tap.

Aesthetic Standards Versus Health-Based Limits for Chromium-6

Secondary standards address taste and appearance, not safety

Chloride and total dissolved solids levels influence water’s taste and corrosivity but do not serve as health safety limits for chromium-6. They relate to aesthetic secondary standards, which differ from any health-based thresholds.

No federal maximum contaminant level exists for chromium-6 specifically

The EPA has not established a maximum contaminant level for chromium-6; however, total chromium is regulated with a maximum contaminant level of 100 µg/L (parts per billion). The chromium-6 detections in Pasco County’s system fall well below this total chromium MCL, according to UCMR3 monitoring.

Pasco County Utilities District - West’s public water system record indicates no EPA health-based violations, underscoring that chromium-6 detections reflect measurements rather than safety concerns.

Summary and Sources

This checklist summarizes government monitoring of chromium-6 in Pasco County's public water system serving New Port Richey. The EPA UCMR3 survey recorded multiple detections of hexavalent chromium at low levels in surface water-supplied distribution. These findings do not pertain to any individual household’s water without specific testing. To address chromium-6 concerns at home, the Autotrol Chromium-6 Filter offers a documented technology that ships ready to configure, designed to treat this specific constituent directly at the point of use.

For authoritative data and updates, consult the EPA’s public water system records and UCMR monitoring results.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2013-09-03. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Pasco County Utilities District - West (FL6511361), FL: 80 results across 2 listed contaminants, 32 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L