Contaminant Search

Indoor

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Introduction

Public/City or Private/Well

Contaminants

Introduction

Primary Contaminants

Microbiological

Introduction Bacteria E. Coli Total Coliform Bacteria Giardia Cryptosporidium Viruses Waterborne Pathogens

Inorganics

Introduction Antimony Arsenic Barium Beryllium Cadmium Chromium Copper Cyanide Fluoride Lead Mercury Nitrates / Nitrites Selenium Thallium Turbidity

VOCs

Introduction Benzene Carbon Tetrachloride Chloroform and Trichloromethane Ethylbenzene Methylene Chloride- Dichloromethane (DCM)MTBE- Methyl tert-butyl ether Tetrachloroethylene Xylenes

SOCs

Introduction Atrazine Alachlor Glyphosate 2,4-D gamma-Hexachlorocyclohexane (Lindane)
Bis (2-Ethylhexyl) phthalate / DEHP
Herbicides, Pesticides, Insecticides, and Organochlorines

Disinfection By-products

Introduction Trihalomethanes Haloacetic Acids Chlorite Bromate

Radioactive Isotopes

Introduction Gross Alpha Beta Particles Radium 226 and Radium 228 Uranium Radon

Introduction

Secondary Contaminants

Introduction

Inorganics

Introduction Aluminum Chloride Copper Fluoride Iron Manganese Silver Sulfate, Hydrogen Sulfide, Sulfate-Reducing Bacteria, and Sulfur Total Dissolved Solids Zinc

Conditions

Introduction Corrosivity Foaming Agents pH Color, Taste and Odor

No Standards Contaminants

Introduction

Microbiological

Introduction Nuisance Bacteria Iron Bacteria Pink Bacteria Sulfate-Reducing Bacteria Slime Bacteria

Inorganics

Introduction Alkalinity Boron Bromide Hardness Lithium Sodium Strontium

Organics

Introduction Acetone Glycols Methyl Ethyl Ketone (2-Butanone - MEK)Naphthalene PFOA PFOS PFAS PFCs (Perfluorinated Chemicals) - "Forever Chemical"

Gases

Introduction Methane

Conditions

Introduction Corrosivity Dissolved Gases Elevated Chlorine and Chlorine By-Products Broken Water Line

Standards

Water Science Basics

Water in the Universe

Drinking Water Topics

Introduction

Groundwater and the Water Cycle (Pennsylvania Example)

Groundwater Under the Influence

The pH of Water

Drinking Water Testing, Conductivity, and Total Dissolved Solids

How To Clean and Remove Iron and Manganese Staining From Your Appliance and Porcelain

Methyl Tertiary Butyl Ether MTBE- Well / Groundwater Contamination Issues

Autoimmune Diseases

Cryptosporidium parvum Drinking Water Protozoan

Giardia and Waterborne Disease

Giardia, Cryptosporidium, and Waterborne Disease

The Care and Feeding of Your Well

Biofouling of a Well

Hot Water Heater / Hydrogen Sulfide Odor

Case Studies

Introduction

Common Drinking Water Problems

Introduction

Case Study 1 | Natural Gas Region / Water Discoloration

Case Study 2 | Natural Gas Region / Water Contamination of a Private Well

Case Study 3 | Plastic Well Casing and Standard Well Cap

Case Study 4 | Natural Gas Region / Water is Fizzy

Case Study 5 | Water is Green - Alkaline/Metal Taste / Odor

Case Study 6 | Repeated Hot Water Heater Failures

Case Study 7 | Natural Gas Region / Green Particles in My Water

Case Study 8 | Black Particles in the Water

Case Study 9 | Dirty Discolored Water, Bacteria, Iron Staining, and Odors

Case Study 10 | Natural Gas Region / Frac Sand in My Well?! Gray-White Sticky Material

Case Study 11 | Natural Gas Region / Black Water - Sulfur Smell

Commercial

Introduction

Smith Paint Products

Arsenic Research Project

Get Tested

Level 4 Baseline Testing

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Introduction

Treatment Types

Introduction

Aeration

Arsenic Treatment Systems

Carbon Filtration

Chemical Disinfection, Chlorination, Ozone

Commercial Water Treatment Systems

CounterTop POU (Point-of-Use) Units

Distillation Systems

Ion Exchange

Iron and Manganese Control and Nuisance Reduction

Neutralizing System

Nitrate and Nitrate Removal

Sulfur Treatment and Control

Ultraviolet Disinfection

Under-the-Counter Units

Water Cooler Systems

Water Softener

Treatment Topics

Introduction

Chlorine Disinfection Contact Time (Basic)

Chlorine Disinfection Contact Time and Inactivation Calculations (Advanced)

Ozonation in Water Treatment

Shock Well Disinfection

UV Disinfection

Water Filtration Plant Performance Evaluations

Get Tools

Introduction

Self-Diagnostic Tool

Water Quality Index Calculator for Drinking Water

Global Drinking Water Quality Database & Map

Neighborhood Environmental Reports

EDR Radius Map with GeoCheck®

Drinking Water Guide for Well Water and City Water

Radon State/County Zones

Wellbore Calculator

Chlorine Contact Calculators

EPA Widgets

Get Training

Introduction

Curriculum for Educators & Students

Citizen Monitoring and Training

Classroom and Field Training

Online Education Resources

Get Involved

Get Informed

Watershed

The Hydrological Cycle

The Hydrological Cycle - Water Budgets

Stream Water Quality

Stream Water Quality - Importance of Total Suspended Solids / Turbidity

Stream Water Quality - Importance of Temperature

Streamflow Measurement

Ecosystem and Lake Productivity by Chlorophyll Analysis

Phosphate in Surface Water Streams, Lakes, and Ponds

pH in the Environment

pH Buffering Systems and Solutions

The Role of Alkalinity in Citizen Monitoring

Ammonia in Groundwater, Runoff, and Streams

Metals in the Environment

Dissolved Oxygen in Water

Phosphates in the Environment

Macroinvertebrates and Rapid Biological Assessments Protocols

Fecal Coliform Bacteria in Water

Surface Water Investigation Protocol (SWIP) and the Microscopic Particulate Analysis Assessment (MPA / SWIP)

Stormwater Management and Water Reuse, Low-Impact Development

Stormwater Best-Management Practices

Case Studies

Introduction

Research Projects and Consulting Projects in Hydrogeology

Crescent Lake Watershed Assessment Project

Roamingwood Sewer and Water Association

Powerpoint

Get Tools

Introduction

Water Quality Index Calculator for Surface Water

Water Quality Index Calculator for Surface Water Guide

Citizen-Science Global Surface-Water-Quality Database & Map

Unit Conversion Calculators

Conversion Factors for Water Quality

Global Directory of Citizen Scientist Teams, Conservation Groups, and Watershed Organizations

Get Training

Introduction

Curriculum for Educators & Students

Citizen Monitoring and Training

Classroom and Field Training

Online Education Resources

Get Connected

Get Involved

Introduction

Become a Citizen Scientist

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Have a Question about a Water Quality Issue, Water Testing or Water Treatment? Contact Us

Global Drinking Water Quality Database & Map (Coming Soon)

Additional Resources

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Links

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