Can be used to check the effectiveness of charcoal filtration units for they may amplify bacterial populations. The aerobic plate count should not exceed 500/ml.

Arsenic concentrations in excess of 0.01 mg/l may cause loss of energy and fatigue, gastroenteritis, burning esophageal pain, vomiting and copious watery or bloody diarrhea containing shreds of mucous. Death may result due to circulatory failure.

Symptoms:
Loss of energy, fatigue, stomach pain, nausea, vomiting, watery or bloody diarrhea, thickening or discoloration of skin…leading to skin cancer, numbness in hands & feet.

Affects young children, older adults, people with long-term illnesses, and unborn babies first.

The acceptable level is 2 mg/l. Barium may cause increased blood pressure.

The acceptable level is 0.005 mg/l. Cadmium plays a role in bone disease, osteomalacia, and causes increased salivation, choking, vomiting, abdominal pain, anemia, renal dysfunction, diarrhea, and tenesmus.

Chromium ingestion in excess of 0.05 mg/l may cause dizziness, intense thirst, abdominal pain, vomiting, shock and oliguria or anuria (suppression of urinary output). Hexavalent chromium has been shown to cause cancer in mice.

The presence of coliform bacteria in your water supply is indicative of fecal pollution. Diseases such as diarrhea, Asiatic cholera, salmonellosis, dysentery, hepatitis, typhoid fever, urinary tract infections, ear infections, colitis and skin diseases may be spread through fecal contaminated water.

Symptoms:
Frequent ear & eye infections, diarrhea, urinary tract infections, skin diseases.

The acceptable level is 1.3 mg/l. Copper may cause nausea and diarrhea.

Low levels of cyanide poisoning 0.20 mg/l may result in weakness, dizziness, headache, nausea and vomiting, which occur rapidly. Ultimately cyanide poisoning results in unresponsive hypotension, respiration slow and gasping, dilated pupils, cyanosis at high levels and finally death. Cyanide has a classical odor of bitter almonds.

Fluoride levels of 4.0 mg/l* or more may act as direct cellular poisons by interfering with calcium metabolism and enzyme mechanisms. Ingestion causes salivation, nausea, vomiting, diarrhea and abdominal pain. Later weakness, tremors, shallow respiration, spasms and convulsions may occur, as well as jaundice and urine suppression. It also may cause discoloration of the teeth.

These compounds have been linked to cancer and other health related problems, symptoms may be similar to those of the flu. Scan also includes PCB's.

Symptoms:
May cause cancer.
May cause liver and kidney damage.
May cause thyroid and reproductive organ damage.
Nervous, immune, and circulatory system effects.

Iron limits of 0.3 mg/l were established as secondary standards because of their aesthetic problems of staining clothes and appliances. In dairy sanitation it should be less than 0.1 mg/l.

Lead concentrations in excess of 0.015 mg/l may result in black stools, a metallic taste, abdominal pain, vomiting, diarrhea, oliguria, (diminution in the quantity of urine excreted), collapse and coma. It is particularly harmful to children for it may lower their intelligence. Pregnant women may bear children with clubfeet, or with neurological, mental or physical abnormalities. It also may be a major cause of hypertension, brain and kidney damage, stroke and heart attacks for middle age men.

Symptoms:
In children: hearing loss, inability to concentrate, hyperactivity, reduced IQ
In middle aged med: hypertension, brain & kidney damage, strokes, heart attacks

In pregnant women: increased blood pressure, early delivery, low birth weight babies, minor birth defects.

The acceptable limit is 0.002 mg/l. May cause inflammation of mouth and gums, excessive salivation, loosening of teeth, kidney damage, muscle tremors, jerky gait, spasms of extremities, personality changes, depression, irritability, and nervousness.

Levels of nitrates exceeding 10 mg/l as nitrogen have been shown to cause methemoglobinemia in infants. This results in oxygen deprivation which may be harmful to the developing nervous system of young children or cause death by suffocation. Symptoms include chocolate colored blood, headache, flushing of the skin, vomiting, dizziness, marked fall of blood pressure, cyanosis (bluish purple discoloration of skin and mucous membranes), collapse, coma and respiratory paralysis.

Symptoms:
In babies and children: methemoglobinemia (“blue baby syndrome”, Oxygen deprivation which may be harmful to developing nervous systems or cause death by suffocation).

In adults: may cause cancer.

The acceptable limit of sodium in the water is 20.0 mg/l. Sodium is a problem for individuals with cardiovascular diseases.

Ingestion of sulfates in excess of 250 mg/l may cause pain in the abdomen, gastrointestinal irritation, vomiting, watery or bloody diarrhea, tenesmus (painful straining to empty bowels or bladder without the evacuation of them),and collapse.

Sulfide concentrations in excess of 0.1 mg/l can cause irritation and sensory loss. Ingestion of higher concentrations may cause irritation of the gastrointestinal tract, renal (kidney) injury, anoxic (absence of oxygen) effects and damage to the cells of the central nervous system. Sulfides have the odor of rotten eggs and may appear as black particles in the water.

Many of these compounds have been linked to cancer and other health related problems. Scan includes trichloroethylene (TCE), carbon tetrachloride, vinyl chloride, benzene and other compounds.

Zinc concentrations in excess of 5.0 mg/l and nickel concentrations in excess of 0.1 mg/l can cause burning in the mouth and throat, vomiting, watery or bloody diarrhea, tenesmus, retching (strain in vomiting), anuria, liver damage, collapse and convulsions.