Information
Laguna Catemaco is surrounded by foothills of Volcano San Martín Tuxtla and the Sierra Santa Marta.
In colloquial Spanish, the words laguna (lagoon) and lago (lake) are used interchangeably.

The Laguna is not a crater lake. The lake was formed eons ago, when lava flow from Volcano San Martín
Tuxtla blocked its current northern shore near Coyame, and now stands at 1,115 feet above sea level.

The lake is shallow, averaging 25 feet, with a maximum depth of 72 feet located in the channel between Isla
Agaltepec and the city of Catemaco. The laguna drains via the Rio Grande de Catemaco towards Alvarado
and the Gulf coast and its water level is controlled by a sluice gate which replaced a historic waterfall.
Laguna Catemaco is one of the more productive lakes in
Mexico. Large netting is prohibited to assure the livelihood of
almost 2000 registered fishermen and their catch of almost
2000 tons.

A perch like fish introduced from Africa (Mojarra Tilapia), a
sardine like Topote, and the snail Tegogolo are the most
common catches.

Prevailing climate around the Laguna  is hot and humid with
average temperature of 76f. Rainfall varies seasonally with
averages of 81 inches recorded at Catemaco and more than
double that at Coyame (northeast of the laguna).

March to early June is the dry season and the  water levels
drop three to five feet.
Lake Catemaco has a surface area of 28 square miles, is
almost square with maximum width and axis of a little more than
6.2 miles. The laguna is Mexico´s #18 in size of water bodies,
The shoreline is irregular, with remnants of several volcanic
cones and its perimeter is about 31 miles.

There are several volcanic islands within the lake. Several of
these islands hold Macaque monkeys, previously imported from
Thailand for an abandoned research project. The presence of
the monkeys has led to almost 100 small boats
rushing across the lake to show tourists these immigrant
monkeys.

The University of Veracruz maintains a current research
project of Mexican Howler monkeys on Isla Agaltepec which
is closed to casual visitors.
draft
Winds from the Gulf of Mexico enter the Catemaco laguna
watershed to the north of the town of Coyame, and cross the
lake in a NE-SW direction, blowing strongly over the lake
throughout the year.

From February to October, northeast
winds are dominant. Colder and faster northern winds blow
from November to January.

Plans for a sail boat marina are in the talking stage.
Artícles and Albums
Articles
Albums
Data
Links
Major Laguna Catemaco Studies
UNAM 1985- Diversidad y Abundancia del Plancton en la Laguna de Catemaco
UNAM 1991- Geomorfologia y Batrimetia del Lago de Catemaco
BIOLOGIA TROPICAL 1993- Species composition, abundance and distribution of zooplankton in Lake Catemaco
UNAM 1994- Los Sedimentos Recientes del Lago de Catemaco
Abstract 2001- Steady state of phytoplankton assemblage in the tropical Lake Catemaco
SEMARNAT 2002- Calidad del agua del Lago Catemaco conforme a parametros... 1990-2001

COFEMER 2004-  Proyecto de Norma - Pesca responsable en el lago Catemaco
NALMS - definition of terms used in lake studies
another study:
Estudio sistematico de metales pesados en maleza nociva que se desarolla el el Lago de Catemaco,
Veracruz,
autor: Maria Josefina Paredes Gonzalez, clave: 2004.09.61, which is used by the Laguna
fishermen and tour boat operators as the basis for the "Laguna is NOT contaminated" articles, is not
accessible on the internet (2009).
Population
Aside from the city of Catemaco with more than 26,000 inhabitants, almost 6,000 more people live along the shores of Laguna
Catemaco in 8 substantial population centers. Most are dedicated to fishing. None of the 8 have public drainage facilities.

For more info about many of these villages, please open
Laguna Pueblos.
Slideshow
Laguna Catemaco
Catemaco, Veracruz
Surface: 73 km²
Depth:  maximum 22m, average 7.6 m, center 11m
Sizes: maximum width 10,250 m, length 12,320 m
Shape: elliptical bowl
Perimeter: 49,754 m
Volume: 553 millon cubic meters
Watershed:  app. 323 km²