National Water Quality Month: 10 Facts & What They Miss

Written by: Scott Steveson, Specialist, Wellness Quality Institute

Key Takeaways for Water Quality and Brand Claims

• The five core water-quality indicators, pH, turbidity, dissolved oxygen, total dissolved solids (TDS), and microbial counts, form the baseline regulators and labs use to judge safety. Each indicator has its own detection limits.
• National Water Quality Month, established in 2005, and the Clean Water Act and Safe Drinking Water Act together shape the rules that govern more than 150,000 U.S. public water systems.
• Current EPA standards cover roughly 90 contaminants, including newly finalized PFAS limits. Secondary guidance recommends pH between 6.5–8.5, turbidity below 1 NTU, and TDS under 500 mg/L.
• Global data show 2.1 billion people still lack safely managed drinking water. Every lab result is bounded by its detection floor, so “none detected” never proves complete absence.
• Brands can turn existing third-party lab data into clear, defensible claims through independent review by The Wellness Quality Institute.

10 National Water Quality Month Facts

1. National Water Quality Month was established in 2005 by the U.S. Environmental Protection Agency. The EPA created the August observance to highlight the vital importance of clean, safe water to public health, thriving communities, and a sustainable environment. The observance builds on a legislative foundation that began more than thirty years earlier.
2. The Clean Water Act of 1972 created the core structure for regulating water pollution in the United States. The Act, codified at 33 U.S.C. § 1251 et seq. and built on the Federal Water Pollution Control Act of 1948, aims to restore and maintain the chemical, physical, and biological integrity of the nation's waters, with a stated goal of eliminating the discharge of pollutants into navigable waters. It introduced the National Pollutant Discharge Elimination System (NPDES), a permit program that requires authorization before any point source, such as a factory, municipal plant, or stormwater system, may discharge pollutants into U.S. waters.
3. The Safe Drinking Water Act of 1974 is the primary federal law governing the quality of America's drinking water. Congress enacted the SDWA in 1974 and amended it in 1986 and 1996. It authorizes the EPA to set national standards that protect against health effects from naturally occurring and man-made contaminants, and it applies to public water systems, defined as those serving at least 15 connections or 25 people for 60 or more days per year. More than 150,000 systems serve over 300 million people across the United States. SDWA standards do not cover private individual wells.
4. The EPA currently regulates approximately 90 contaminants under enforceable health-based drinking water standards. National Primary Drinking Water Regulations set either a maximum contaminant level (MCL), a numeric concentration limit, or a treatment technique (TT), a required process used when a numeric limit is not analytically practical. In 2024, the EPA finalized limits for PFAS, a class of synthetic chemicals used in many industrial and consumer products, as part of ongoing rule revisions.
5. Each American uses an average of 82 gallons of water per day at home. The EPA WaterSense program, citing the U.S. Geological Survey's 2015 national water-use estimate, reports that outdoor use accounts for more than 30 percent of total household consumption on average, and up to 60 percent in arid regions. The average U.S. family wastes approximately 9,400 gallons annually from household leaks alone.
6. As of 2024, approximately 2.1 billion people worldwide still lack safely managed drinking water. The World Health Organization's World Health Statistics 2026 report found that global coverage of safely managed drinking-water services rose from 68% of the world's population in 2015 to 74% in 2024, meaning roughly one in four people still lacked access, including some 106 million who relied on untreated surface water from lakes, ponds, and rivers. Rural coverage improved from 50% to 60% over the same period, while urban coverage remained around 83%.
7. Drinking water pH should fall between 6.5 and 8.5 under EPA guidance. pH is measured on a 0–14 scale using a calibrated probe that detects hydrogen ion concentration. Values outside the 6.5–8.5 range can affect corrosion of pipes, chemical treatment effectiveness, and the solubility of other contaminants. pH is one of the most continuously monitored parameters in both drinking water treatment and distribution systems.
8. Turbidity in drinking water should remain below 1 NTU in developed countries under standard guidance. Turbidity, the cloudiness caused by suspended particles, is measured in Nephelometric Turbidity Units using a nephelometer or turbidity meter. The threshold rises to 5 NTU in many developing-country contexts. High turbidity can shield microorganisms from disinfection, so it functions as a critical operational indicator rather than only an aesthetic one.
9. The EPA recommends that total dissolved solids (TDS) in drinking water not exceed 500 mg/L as a non-enforceable secondary standard for aesthetic reasons. TDS includes all dissolved substances, such as minerals, salts, metals, and organic compounds, and is typically measured by conductivity meters or gravimetric analysis. TDS is a general-chemistry indicator. A low reading does not confirm the absence of any specific contaminant, only that the total dissolved load falls within a threshold.
10. Microbial indicators, including total coliforms, thermotolerant coliforms, and E. coli, are the primary biological parameters used to assess fecal contamination risk in drinking water. Total coliforms evaluate general fecal contamination, thermotolerant coliforms indicate the recency of pollution, and E. coli serves as a direct indicator of hygienic quality. Heterotrophic plate count reflects overall microbial levels and disinfection effectiveness. Detection of any of these organisms in a finished water sample typically triggers immediate regulatory response.

Why Water Quality Numbers Have Hidden Limits

Every statistic above has a boundary that the number itself does not reveal. Knowing those boundaries separates a defensible water-quality claim from an overstatement.

Detection floors. Every analytical method has a lower limit, a concentration below which the instrument cannot reliably detect a substance. The EPA sets maximum contaminant level goals (MCLGs) based solely on public health considerations, without accounting for limits of detection or treatment technology. This approach can result in MCLGs at levels that public water systems cannot currently measure or meet with available technology. A result of “none detected” means none found above that instrument's floor, not none present.

Regulatory definitions versus laboratory results. A regulatory standard defines what a public water system must achieve and monitor. A laboratory result reports what a specific method found in a specific sample on a specific date. When no reliable, economically and technically feasible laboratory method exists to measure a contaminant at concentrations of public health concern, the EPA establishes a treatment technique rule instead of a numeric limit. This approach acknowledges that regulatory intent and analytical capability do not always align.

No laboratory can confirm complete absence. A positive finding requires one confirmed detection. A claim of complete absence would require certainty about everything the method cannot see, including every particle or molecule below the detection floor, every substance outside the tested panel, and every sample not drawn. Water purity claims for analytical applications are defensible only when tied to explicit measurable criteria such as resistivity, total organic carbon (TOC), microbial load, and the specific instrument or assay for which the water is intended. The same principle applies to any consumer-facing water or liquid-product claim. The claim is only as strong as the method that generated the data behind it.

How WQI Turns Lab Reports into Verifiable Claims

Many brands already hold genuinely useful laboratory data on their water or liquid products. The gap often lies in independent review that converts a laboratory report into a claim the market can trust.

The Wellness Quality Institute (WQI) is an independent verification body that reviews companies' existing third-party laboratory datasets on plastic and microplastic content against a defined standard. This process helps brands substantiate real progress toward plastic-free standards, instead of making absolute claims that current science cannot fully support. WQI's review standard, WQI-CS-01, aligns with one of the most stringent publicly available references for this type of analysis. This reference serves as a technical benchmark, not a geographic boundary, and verification is available to U.S. companies nationally.

WQI does not perform laboratory testing. It reviews the dataset a company has already commissioned from a qualified independent laboratory. The review assesses the analytical method, product scope, tested particle-size range, polymer panel, reporting limits, blank controls, and chain of custody. The review produces one of two outcomes. Standard Met carries a verification decision, a scope-locked license to use the WQI mark, a public registry listing, and approved claim language. Standard Not Met is a private outcome that is never described as a failed product and may be resubmitted with updated information.

Verification applies only to the reviewed product, dataset, tested particle-size ranges, polymer panel, and production period. No company-wide or product-line claim may extend from a single dataset. A single assessment fee covers the review, verification decision, and registry listing. Independent laboratory testing is arranged and billed separately.

WQI Plastic-Free Pathway Verification does not certify that a product contains zero plastic, microplastics, or nanoplastics. It shows that the company is on a verified pathway toward plastic-free standards. Verification applies only to the reviewed products, submitted datasets, tested ranges, polymer panels, production or sampling periods, and supporting controls. WQI verification is not a government certification, or health or safety certification.

Turn your existing lab data into a claim you can support by talking to WQI about Plastic-Free Pathway Verification.

Frequently Asked Questions

What are the 5 main indicators of water quality?

The five main indicators used across regulatory and scientific contexts to assess water quality are:

• pH, a measure of how acidic or alkaline water is, on a scale from 0 to 14. The recommended range is 6.5 to 8.5. Values outside this range can accelerate pipe corrosion, affect disinfection chemistry, and alter the solubility of other contaminants.
• Turbidity, the cloudiness of water caused by suspended particles such as sediment, algae, or organic matter, measured in Nephelometric Turbidity Units (NTU). Drinking water in developed countries is generally expected to remain below 1 NTU. High turbidity is operationally significant because particles can shield microorganisms from disinfection.
• Dissolved oxygen (DO), the concentration of oxygen dissolved in water, measured in milligrams per liter (mg/L). Drinking water should generally exceed 6.5–8 mg/L. DO also serves as a key indicator of aquatic ecosystem health and treatment process performance.
• Total dissolved solids (TDS), the aggregate concentration of all dissolved substances in water, including minerals, salts, and organic compounds, measured in parts per million (ppm). The EPA's secondary guidance sets this threshold at 500 mg/L for aesthetic reasons. TDS is a general indicator, so a low reading does not confirm the absence of any specific contaminant.
• Microbial indicators, bacteria and other microorganisms used to assess contamination risk. Total coliforms, thermotolerant coliforms, Escherichia coli, and heterotrophic plate count are the primary parameters. Their presence in finished drinking water signals a breakdown in treatment or distribution integrity and typically triggers immediate regulatory response.

What does “none detected” mean on a water quality lab report?

A result of “none detected” means that the laboratory's instruments found no measurable quantity of a target substance above the method's detection limit, the lowest concentration the instrument can reliably identify. It does not mean the substance is absent. Every analytical method has a floor below which it cannot see, and a clean result is bounded entirely by that floor. A method that detects a contaminant at concentrations above 0.5 micrograms per liter, for example, cannot make any statement about what exists below that threshold. This distinction matters for any brand making a water-quality or purity claim. The claim is only as strong as the method's detection capability, and that capability must be stated explicitly for the claim to be defensible.

What is the difference between a regulatory water quality standard and a laboratory result?

A regulatory standard, such as an EPA maximum contaminant level (MCL), defines the maximum permissible concentration of a substance in a public water supply, set on the basis of public health considerations. A laboratory result reports what a specific analytical method found in a specific sample collected at a specific time. These are related but distinct things. A regulatory standard tells a water system what it must achieve. A laboratory result tells an operator what was measured on a given day, using a given instrument, in a given sample. Compliance with a standard requires ongoing monitoring across many samples, not a single clean result. Additionally, the EPA sometimes sets treatment technique rules rather than numeric MCLs when no reliable method exists to measure a contaminant at concentrations of health concern. This approach explicitly acknowledges that regulatory intent and current analytical capability do not always align.

Why does National Water Quality Month matter for brands making water or liquid-product claims?

National Water Quality Month in August, established by the EPA in 2005, raises public and media attention to water safety, treatment standards, and the gap between regulatory requirements and what consumers can verify on their own. For brands making claims about the purity or plastic content of water or liquid products, this heightened attention has a practical consequence. The claims on packaging face more scrutiny during this period from consumers, retailers, and journalists alike. A claim that rests on a single internal lab report, or on a “none detected” result without a stated detection floor, is structurally weaker than one that has been independently reviewed against a published standard. The month serves as a useful prompt for any brand to assess whether its existing laboratory data is being used to its full defensible potential, or whether it is sitting in a folder doing no work at all.

Conclusion: Turning Water Quality Facts into Defensible Claims

National Water Quality Month facts are only as useful as the measurement limits that bound them. The five indicators, the legislative milestones, the global access statistics, and the per-capita consumption figures all carry boundaries that the numbers themselves do not announce. Knowing those boundaries, such as what a detection floor means, what a regulatory standard does and does not prove, and why no laboratory can confirm complete absence, separates an informed claim from an overstatement.

For brands that have already invested in independent laboratory testing of their water or liquid products, the next step often is not more testing. The next step is an independent review that converts existing data into a claim with a defined scope, approved language, and a public registry entry that any buyer, retailer, or journalist can check.

Learn how WQI verification converts your laboratory reports into defensible, clearly scoped market claims.