Limits...
Socio-Environmental Health Analysis in Nogales, Sonora, Mexico.

Norman LM, Caldeira F, Callegary J, Gray F, O' Rourke MK, Meranza V, Van Rijn S - Water Qual Expo Health (2012)

Bottom Line: Microbial contamination was significantly higher in the summer than in the winter in both colonias.Chloride was found to be significantly greater in Colosio (median 29.2 mg/L) although still below the US EPA's maximum contaminant levels of 250 mg/L.Ongoing binational collaboration can promote mechanisms to improve water quality in cities located in the US-Mexico border.

View Article: PubMed Central - PubMed

ABSTRACT
In Nogales, Sonora, Mexico, some neighborhoods, or colonias, have intermittent delivery of water through pipes from the city of Nogales's municipal water-delivery system while other areas lack piped water and rely on water delivered by truck or pipas. This research examined how lifestyles, water quality, and potential disease response, such as diarrhea, differs seasonally from a colonia with access to piped water as opposed to one using alternative water-delivery systems. Water samples were collected from taps or spigots at homes in two Nogales colonias. One colonia reflected high socio-environmental conditions where residents are supplied with municipal piped water (Colonia Lomas de Fatima); the second colonia reflected low socio-environmental conditions, lacking access to piped water and served by pipas (Colonia Luis Donaldo Colosio). A survey was developed and implemented to characterize perceptions of water quality, health impacts, and quality of life. Water samples were analyzed for microbial and inorganic water-quality parameters known to impact human health including, Escherichia coli (E. coli), total coliform bacteria, arsenic, and lead. A total of 21 households agreed to participate in the study (14 in Colosio and 7 in Fatima). In both colonias metal concentrations from water samples were all well below the United States Environmental Protection Agency's (US EPA's) maximum contaminant levels. E. coli concentrations exceeded the US EPA's drinking-water standard in Colosio but not Fatima. Total coliform bacteria were present in over 50 % of households in both colonias. Microbial contamination was significantly higher in the summer than in the winter in both colonias. Resulting analysis suggests that residents in colonias without piped water are at a greater risk of gastrointestinal illness from consumption of compromised drinking water. Our survey corroborated reports of gastrointestinal illness in the summer months but not in the winter. Chloride was found to be significantly greater in Colosio (median 29.2 mg/L) although still below the US EPA's maximum contaminant levels of 250 mg/L. Ongoing binational collaboration can promote mechanisms to improve water quality in cities located in the US-Mexico border.

No MeSH data available.


Related in: MedlinePlus

Diagram of tinaco with access to system and house
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3375430&req=5

Fig3: Diagram of tinaco with access to system and house

Mentions: Tinacos (plastic water storage tanks) are purchased from home improvement stores and mounted on rooftops in colonias with wealthy residents (Ingram et al. 1994). A hose attached to the tinaco delivers water to the house by gravity (Fig. 3). Tambos (metal water storage tanks) are most often found in the less affluent colonias marginales and are usually scavenged from local industries and placed at ground level (Ingram et al. 1994). Little, if any, information about the tambo’s prior contents is known by the user. Fig. 3


Socio-Environmental Health Analysis in Nogales, Sonora, Mexico.

Norman LM, Caldeira F, Callegary J, Gray F, O' Rourke MK, Meranza V, Van Rijn S - Water Qual Expo Health (2012)

Diagram of tinaco with access to system and house
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3375430&req=5

Fig3: Diagram of tinaco with access to system and house
Mentions: Tinacos (plastic water storage tanks) are purchased from home improvement stores and mounted on rooftops in colonias with wealthy residents (Ingram et al. 1994). A hose attached to the tinaco delivers water to the house by gravity (Fig. 3). Tambos (metal water storage tanks) are most often found in the less affluent colonias marginales and are usually scavenged from local industries and placed at ground level (Ingram et al. 1994). Little, if any, information about the tambo’s prior contents is known by the user. Fig. 3

Bottom Line: Microbial contamination was significantly higher in the summer than in the winter in both colonias.Chloride was found to be significantly greater in Colosio (median 29.2 mg/L) although still below the US EPA's maximum contaminant levels of 250 mg/L.Ongoing binational collaboration can promote mechanisms to improve water quality in cities located in the US-Mexico border.

View Article: PubMed Central - PubMed

ABSTRACT
In Nogales, Sonora, Mexico, some neighborhoods, or colonias, have intermittent delivery of water through pipes from the city of Nogales's municipal water-delivery system while other areas lack piped water and rely on water delivered by truck or pipas. This research examined how lifestyles, water quality, and potential disease response, such as diarrhea, differs seasonally from a colonia with access to piped water as opposed to one using alternative water-delivery systems. Water samples were collected from taps or spigots at homes in two Nogales colonias. One colonia reflected high socio-environmental conditions where residents are supplied with municipal piped water (Colonia Lomas de Fatima); the second colonia reflected low socio-environmental conditions, lacking access to piped water and served by pipas (Colonia Luis Donaldo Colosio). A survey was developed and implemented to characterize perceptions of water quality, health impacts, and quality of life. Water samples were analyzed for microbial and inorganic water-quality parameters known to impact human health including, Escherichia coli (E. coli), total coliform bacteria, arsenic, and lead. A total of 21 households agreed to participate in the study (14 in Colosio and 7 in Fatima). In both colonias metal concentrations from water samples were all well below the United States Environmental Protection Agency's (US EPA's) maximum contaminant levels. E. coli concentrations exceeded the US EPA's drinking-water standard in Colosio but not Fatima. Total coliform bacteria were present in over 50 % of households in both colonias. Microbial contamination was significantly higher in the summer than in the winter in both colonias. Resulting analysis suggests that residents in colonias without piped water are at a greater risk of gastrointestinal illness from consumption of compromised drinking water. Our survey corroborated reports of gastrointestinal illness in the summer months but not in the winter. Chloride was found to be significantly greater in Colosio (median 29.2 mg/L) although still below the US EPA's maximum contaminant levels of 250 mg/L. Ongoing binational collaboration can promote mechanisms to improve water quality in cities located in the US-Mexico border.

No MeSH data available.


Related in: MedlinePlus